1 /* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #ifndef MAC80211_H 16 #define MAC80211_H 17 18 #include <linux/bug.h> 19 #include <linux/kernel.h> 20 #include <linux/if_ether.h> 21 #include <linux/skbuff.h> 22 #include <linux/ieee80211.h> 23 #include <net/cfg80211.h> 24 #include <net/codel.h> 25 #include <asm/unaligned.h> 26 27 /** 28 * DOC: Introduction 29 * 30 * mac80211 is the Linux stack for 802.11 hardware that implements 31 * only partial functionality in hard- or firmware. This document 32 * defines the interface between mac80211 and low-level hardware 33 * drivers. 34 */ 35 36 /** 37 * DOC: Calling mac80211 from interrupts 38 * 39 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 40 * called in hardware interrupt context. The low-level driver must not call any 41 * other functions in hardware interrupt context. If there is a need for such 42 * call, the low-level driver should first ACK the interrupt and perform the 43 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 44 * tasklet function. 45 * 46 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 47 * use the non-IRQ-safe functions! 48 */ 49 50 /** 51 * DOC: Warning 52 * 53 * If you're reading this document and not the header file itself, it will 54 * be incomplete because not all documentation has been converted yet. 55 */ 56 57 /** 58 * DOC: Frame format 59 * 60 * As a general rule, when frames are passed between mac80211 and the driver, 61 * they start with the IEEE 802.11 header and include the same octets that are 62 * sent over the air except for the FCS which should be calculated by the 63 * hardware. 64 * 65 * There are, however, various exceptions to this rule for advanced features: 66 * 67 * The first exception is for hardware encryption and decryption offload 68 * where the IV/ICV may or may not be generated in hardware. 69 * 70 * Secondly, when the hardware handles fragmentation, the frame handed to 71 * the driver from mac80211 is the MSDU, not the MPDU. 72 */ 73 74 /** 75 * DOC: mac80211 workqueue 76 * 77 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 78 * The workqueue is a single threaded workqueue and can only be accessed by 79 * helpers for sanity checking. Drivers must ensure all work added onto the 80 * mac80211 workqueue should be cancelled on the driver stop() callback. 81 * 82 * mac80211 will flushed the workqueue upon interface removal and during 83 * suspend. 84 * 85 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 86 * 87 */ 88 89 /** 90 * DOC: mac80211 software tx queueing 91 * 92 * mac80211 provides an optional intermediate queueing implementation designed 93 * to allow the driver to keep hardware queues short and provide some fairness 94 * between different stations/interfaces. 95 * In this model, the driver pulls data frames from the mac80211 queue instead 96 * of letting mac80211 push them via drv_tx(). 97 * Other frames (e.g. control or management) are still pushed using drv_tx(). 98 * 99 * Drivers indicate that they use this model by implementing the .wake_tx_queue 100 * driver operation. 101 * 102 * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a 103 * single per-vif queue for multicast data frames. 104 * 105 * The driver is expected to initialize its private per-queue data for stations 106 * and interfaces in the .add_interface and .sta_add ops. 107 * 108 * The driver can't access the queue directly. To dequeue a frame, it calls 109 * ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it 110 * calls the .wake_tx_queue driver op. 111 * 112 * For AP powersave TIM handling, the driver only needs to indicate if it has 113 * buffered packets in the driver specific data structures by calling 114 * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq 115 * struct, mac80211 sets the appropriate TIM PVB bits and calls 116 * .release_buffered_frames(). 117 * In that callback the driver is therefore expected to release its own 118 * buffered frames and afterwards also frames from the ieee80211_txq (obtained 119 * via the usual ieee80211_tx_dequeue). 120 */ 121 122 struct device; 123 124 /** 125 * enum ieee80211_max_queues - maximum number of queues 126 * 127 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 128 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 129 */ 130 enum ieee80211_max_queues { 131 IEEE80211_MAX_QUEUES = 16, 132 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 133 }; 134 135 #define IEEE80211_INVAL_HW_QUEUE 0xff 136 137 /** 138 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 139 * @IEEE80211_AC_VO: voice 140 * @IEEE80211_AC_VI: video 141 * @IEEE80211_AC_BE: best effort 142 * @IEEE80211_AC_BK: background 143 */ 144 enum ieee80211_ac_numbers { 145 IEEE80211_AC_VO = 0, 146 IEEE80211_AC_VI = 1, 147 IEEE80211_AC_BE = 2, 148 IEEE80211_AC_BK = 3, 149 }; 150 #define IEEE80211_NUM_ACS 4 151 152 /** 153 * struct ieee80211_tx_queue_params - transmit queue configuration 154 * 155 * The information provided in this structure is required for QoS 156 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 157 * 158 * @aifs: arbitration interframe space [0..255] 159 * @cw_min: minimum contention window [a value of the form 160 * 2^n-1 in the range 1..32767] 161 * @cw_max: maximum contention window [like @cw_min] 162 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 163 * @acm: is mandatory admission control required for the access category 164 * @uapsd: is U-APSD mode enabled for the queue 165 */ 166 struct ieee80211_tx_queue_params { 167 u16 txop; 168 u16 cw_min; 169 u16 cw_max; 170 u8 aifs; 171 bool acm; 172 bool uapsd; 173 }; 174 175 struct ieee80211_low_level_stats { 176 unsigned int dot11ACKFailureCount; 177 unsigned int dot11RTSFailureCount; 178 unsigned int dot11FCSErrorCount; 179 unsigned int dot11RTSSuccessCount; 180 }; 181 182 /** 183 * enum ieee80211_chanctx_change - change flag for channel context 184 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 185 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 186 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 187 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 188 * this is used only with channel switching with CSA 189 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 190 */ 191 enum ieee80211_chanctx_change { 192 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 193 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 194 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 195 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 196 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 197 }; 198 199 /** 200 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 201 * 202 * This is the driver-visible part. The ieee80211_chanctx 203 * that contains it is visible in mac80211 only. 204 * 205 * @def: the channel definition 206 * @min_def: the minimum channel definition currently required. 207 * @rx_chains_static: The number of RX chains that must always be 208 * active on the channel to receive MIMO transmissions 209 * @rx_chains_dynamic: The number of RX chains that must be enabled 210 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 211 * this will always be >= @rx_chains_static. 212 * @radar_enabled: whether radar detection is enabled on this channel. 213 * @drv_priv: data area for driver use, will always be aligned to 214 * sizeof(void *), size is determined in hw information. 215 */ 216 struct ieee80211_chanctx_conf { 217 struct cfg80211_chan_def def; 218 struct cfg80211_chan_def min_def; 219 220 u8 rx_chains_static, rx_chains_dynamic; 221 222 bool radar_enabled; 223 224 u8 drv_priv[0] __aligned(sizeof(void *)); 225 }; 226 227 /** 228 * enum ieee80211_chanctx_switch_mode - channel context switch mode 229 * @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already 230 * exist (and will continue to exist), but the virtual interface 231 * needs to be switched from one to the other. 232 * @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop 233 * to exist with this call, the new context doesn't exist but 234 * will be active after this call, the virtual interface switches 235 * from the old to the new (note that the driver may of course 236 * implement this as an on-the-fly chandef switch of the existing 237 * hardware context, but the mac80211 pointer for the old context 238 * will cease to exist and only the new one will later be used 239 * for changes/removal.) 240 */ 241 enum ieee80211_chanctx_switch_mode { 242 CHANCTX_SWMODE_REASSIGN_VIF, 243 CHANCTX_SWMODE_SWAP_CONTEXTS, 244 }; 245 246 /** 247 * struct ieee80211_vif_chanctx_switch - vif chanctx switch information 248 * 249 * This is structure is used to pass information about a vif that 250 * needs to switch from one chanctx to another. The 251 * &ieee80211_chanctx_switch_mode defines how the switch should be 252 * done. 253 * 254 * @vif: the vif that should be switched from old_ctx to new_ctx 255 * @old_ctx: the old context to which the vif was assigned 256 * @new_ctx: the new context to which the vif must be assigned 257 */ 258 struct ieee80211_vif_chanctx_switch { 259 struct ieee80211_vif *vif; 260 struct ieee80211_chanctx_conf *old_ctx; 261 struct ieee80211_chanctx_conf *new_ctx; 262 }; 263 264 /** 265 * enum ieee80211_bss_change - BSS change notification flags 266 * 267 * These flags are used with the bss_info_changed() callback 268 * to indicate which BSS parameter changed. 269 * 270 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 271 * also implies a change in the AID. 272 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 273 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 274 * @BSS_CHANGED_ERP_SLOT: slot timing changed 275 * @BSS_CHANGED_HT: 802.11n parameters changed 276 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 277 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 278 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 279 * reason (IBSS and managed mode) 280 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 281 * new beacon (beaconing modes) 282 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 283 * enabled/disabled (beaconing modes) 284 * @BSS_CHANGED_CQM: Connection quality monitor config changed 285 * @BSS_CHANGED_IBSS: IBSS join status changed 286 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 287 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 288 * that it is only ever disabled for station mode. 289 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 290 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 291 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 292 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 293 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 294 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 295 * changed 296 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 297 * currently dtim_period only is under consideration. 298 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 299 * note that this is only called when it changes after the channel 300 * context had been assigned. 301 * @BSS_CHANGED_OCB: OCB join status changed 302 * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed 303 */ 304 enum ieee80211_bss_change { 305 BSS_CHANGED_ASSOC = 1<<0, 306 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 307 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 308 BSS_CHANGED_ERP_SLOT = 1<<3, 309 BSS_CHANGED_HT = 1<<4, 310 BSS_CHANGED_BASIC_RATES = 1<<5, 311 BSS_CHANGED_BEACON_INT = 1<<6, 312 BSS_CHANGED_BSSID = 1<<7, 313 BSS_CHANGED_BEACON = 1<<8, 314 BSS_CHANGED_BEACON_ENABLED = 1<<9, 315 BSS_CHANGED_CQM = 1<<10, 316 BSS_CHANGED_IBSS = 1<<11, 317 BSS_CHANGED_ARP_FILTER = 1<<12, 318 BSS_CHANGED_QOS = 1<<13, 319 BSS_CHANGED_IDLE = 1<<14, 320 BSS_CHANGED_SSID = 1<<15, 321 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 322 BSS_CHANGED_PS = 1<<17, 323 BSS_CHANGED_TXPOWER = 1<<18, 324 BSS_CHANGED_P2P_PS = 1<<19, 325 BSS_CHANGED_BEACON_INFO = 1<<20, 326 BSS_CHANGED_BANDWIDTH = 1<<21, 327 BSS_CHANGED_OCB = 1<<22, 328 BSS_CHANGED_MU_GROUPS = 1<<23, 329 330 /* when adding here, make sure to change ieee80211_reconfig */ 331 }; 332 333 /* 334 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 335 * of addresses for an interface increase beyond this value, hardware ARP 336 * filtering will be disabled. 337 */ 338 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 339 340 /** 341 * enum ieee80211_event_type - event to be notified to the low level driver 342 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver. 343 * @MLME_EVENT: event related to MLME 344 * @BAR_RX_EVENT: a BAR was received 345 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because 346 * they timed out. This won't be called for each frame released, but only 347 * once each time the timeout triggers. 348 */ 349 enum ieee80211_event_type { 350 RSSI_EVENT, 351 MLME_EVENT, 352 BAR_RX_EVENT, 353 BA_FRAME_TIMEOUT, 354 }; 355 356 /** 357 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT 358 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver. 359 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver. 360 */ 361 enum ieee80211_rssi_event_data { 362 RSSI_EVENT_HIGH, 363 RSSI_EVENT_LOW, 364 }; 365 366 /** 367 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT 368 * @data: See &enum ieee80211_rssi_event_data 369 */ 370 struct ieee80211_rssi_event { 371 enum ieee80211_rssi_event_data data; 372 }; 373 374 /** 375 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT 376 * @AUTH_EVENT: the MLME operation is authentication 377 * @ASSOC_EVENT: the MLME operation is association 378 * @DEAUTH_RX_EVENT: deauth received.. 379 * @DEAUTH_TX_EVENT: deauth sent. 380 */ 381 enum ieee80211_mlme_event_data { 382 AUTH_EVENT, 383 ASSOC_EVENT, 384 DEAUTH_RX_EVENT, 385 DEAUTH_TX_EVENT, 386 }; 387 388 /** 389 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT 390 * @MLME_SUCCESS: the MLME operation completed successfully. 391 * @MLME_DENIED: the MLME operation was denied by the peer. 392 * @MLME_TIMEOUT: the MLME operation timed out. 393 */ 394 enum ieee80211_mlme_event_status { 395 MLME_SUCCESS, 396 MLME_DENIED, 397 MLME_TIMEOUT, 398 }; 399 400 /** 401 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT 402 * @data: See &enum ieee80211_mlme_event_data 403 * @status: See &enum ieee80211_mlme_event_status 404 * @reason: the reason code if applicable 405 */ 406 struct ieee80211_mlme_event { 407 enum ieee80211_mlme_event_data data; 408 enum ieee80211_mlme_event_status status; 409 u16 reason; 410 }; 411 412 /** 413 * struct ieee80211_ba_event - data attached for BlockAck related events 414 * @sta: pointer to the &ieee80211_sta to which this event relates 415 * @tid: the tid 416 * @ssn: the starting sequence number (for %BAR_RX_EVENT) 417 */ 418 struct ieee80211_ba_event { 419 struct ieee80211_sta *sta; 420 u16 tid; 421 u16 ssn; 422 }; 423 424 /** 425 * struct ieee80211_event - event to be sent to the driver 426 * @type: The event itself. See &enum ieee80211_event_type. 427 * @rssi: relevant if &type is %RSSI_EVENT 428 * @mlme: relevant if &type is %AUTH_EVENT 429 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT 430 * @u:union holding the fields above 431 */ 432 struct ieee80211_event { 433 enum ieee80211_event_type type; 434 union { 435 struct ieee80211_rssi_event rssi; 436 struct ieee80211_mlme_event mlme; 437 struct ieee80211_ba_event ba; 438 } u; 439 }; 440 441 /** 442 * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data 443 * 444 * This structure describes the group id data of VHT MU-MIMO 445 * 446 * @membership: 64 bits array - a bit is set if station is member of the group 447 * @position: 2 bits per group id indicating the position in the group 448 */ 449 struct ieee80211_mu_group_data { 450 u8 membership[WLAN_MEMBERSHIP_LEN]; 451 u8 position[WLAN_USER_POSITION_LEN]; 452 }; 453 454 /** 455 * struct ieee80211_bss_conf - holds the BSS's changing parameters 456 * 457 * This structure keeps information about a BSS (and an association 458 * to that BSS) that can change during the lifetime of the BSS. 459 * 460 * @assoc: association status 461 * @ibss_joined: indicates whether this station is part of an IBSS 462 * or not 463 * @ibss_creator: indicates if a new IBSS network is being created 464 * @aid: association ID number, valid only when @assoc is true 465 * @use_cts_prot: use CTS protection 466 * @use_short_preamble: use 802.11b short preamble 467 * @use_short_slot: use short slot time (only relevant for ERP) 468 * @dtim_period: num of beacons before the next DTIM, for beaconing, 469 * valid in station mode only if after the driver was notified 470 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 471 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 472 * as it may have been received during scanning long ago). If the 473 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 474 * only come from a beacon, but might not become valid until after 475 * association when a beacon is received (which is notified with the 476 * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. 477 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 478 * the driver/device can use this to calculate synchronisation 479 * (see @sync_tsf). See also sync_dtim_count important notice. 480 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 481 * is requested, see @sync_tsf/@sync_device_ts. 482 * IMPORTANT: These three sync_* parameters would possibly be out of sync 483 * by the time the driver will use them. The synchronized view is currently 484 * guaranteed only in certain callbacks. 485 * @beacon_int: beacon interval 486 * @assoc_capability: capabilities taken from assoc resp 487 * @basic_rates: bitmap of basic rates, each bit stands for an 488 * index into the rate table configured by the driver in 489 * the current band. 490 * @beacon_rate: associated AP's beacon TX rate 491 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 492 * @bssid: The BSSID for this BSS 493 * @enable_beacon: whether beaconing should be enabled or not 494 * @chandef: Channel definition for this BSS -- the hardware might be 495 * configured a higher bandwidth than this BSS uses, for example. 496 * @mu_group: VHT MU-MIMO group membership data 497 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 498 * This field is only valid when the channel is a wide HT/VHT channel. 499 * Note that with TDLS this can be the case (channel is HT, protection must 500 * be used from this field) even when the BSS association isn't using HT. 501 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 502 * implies disabled. As with the cfg80211 callback, a change here should 503 * cause an event to be sent indicating where the current value is in 504 * relation to the newly configured threshold. 505 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 506 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 507 * may filter ARP queries targeted for other addresses than listed here. 508 * The driver must allow ARP queries targeted for all address listed here 509 * to pass through. An empty list implies no ARP queries need to pass. 510 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 511 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 512 * array size), it's up to the driver what to do in that case. 513 * @qos: This is a QoS-enabled BSS. 514 * @idle: This interface is idle. There's also a global idle flag in the 515 * hardware config which may be more appropriate depending on what 516 * your driver/device needs to do. 517 * @ps: power-save mode (STA only). This flag is NOT affected by 518 * offchannel/dynamic_ps operations. 519 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 520 * @ssid_len: Length of SSID given in @ssid. 521 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 522 * @txpower: TX power in dBm 523 * @txpower_type: TX power adjustment used to control per packet Transmit 524 * Power Control (TPC) in lower driver for the current vif. In particular 525 * TPC is enabled if value passed in %txpower_type is 526 * NL80211_TX_POWER_LIMITED (allow using less than specified from 527 * userspace), whereas TPC is disabled if %txpower_type is set to 528 * NL80211_TX_POWER_FIXED (use value configured from userspace) 529 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 530 * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed 531 * to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS 532 * if it has associated clients without P2P PS support. 533 */ 534 struct ieee80211_bss_conf { 535 const u8 *bssid; 536 /* association related data */ 537 bool assoc, ibss_joined; 538 bool ibss_creator; 539 u16 aid; 540 /* erp related data */ 541 bool use_cts_prot; 542 bool use_short_preamble; 543 bool use_short_slot; 544 bool enable_beacon; 545 u8 dtim_period; 546 u16 beacon_int; 547 u16 assoc_capability; 548 u64 sync_tsf; 549 u32 sync_device_ts; 550 u8 sync_dtim_count; 551 u32 basic_rates; 552 struct ieee80211_rate *beacon_rate; 553 int mcast_rate[NUM_NL80211_BANDS]; 554 u16 ht_operation_mode; 555 s32 cqm_rssi_thold; 556 u32 cqm_rssi_hyst; 557 struct cfg80211_chan_def chandef; 558 struct ieee80211_mu_group_data mu_group; 559 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 560 int arp_addr_cnt; 561 bool qos; 562 bool idle; 563 bool ps; 564 u8 ssid[IEEE80211_MAX_SSID_LEN]; 565 size_t ssid_len; 566 bool hidden_ssid; 567 int txpower; 568 enum nl80211_tx_power_setting txpower_type; 569 struct ieee80211_p2p_noa_attr p2p_noa_attr; 570 bool allow_p2p_go_ps; 571 }; 572 573 /** 574 * enum mac80211_tx_info_flags - flags to describe transmission information/status 575 * 576 * These flags are used with the @flags member of &ieee80211_tx_info. 577 * 578 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 579 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 580 * number to this frame, taking care of not overwriting the fragment 581 * number and increasing the sequence number only when the 582 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 583 * assign sequence numbers to QoS-data frames but cannot do so correctly 584 * for non-QoS-data and management frames because beacons need them from 585 * that counter as well and mac80211 cannot guarantee proper sequencing. 586 * If this flag is set, the driver should instruct the hardware to 587 * assign a sequence number to the frame or assign one itself. Cf. IEEE 588 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 589 * beacons and always be clear for frames without a sequence number field. 590 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 591 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 592 * station 593 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 594 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 595 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 596 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 597 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 598 * because the destination STA was in powersave mode. Note that to 599 * avoid race conditions, the filter must be set by the hardware or 600 * firmware upon receiving a frame that indicates that the station 601 * went to sleep (must be done on device to filter frames already on 602 * the queue) and may only be unset after mac80211 gives the OK for 603 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 604 * since only then is it guaranteed that no more frames are in the 605 * hardware queue. 606 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 607 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 608 * is for the whole aggregation. 609 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 610 * so consider using block ack request (BAR). 611 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 612 * set by rate control algorithms to indicate probe rate, will 613 * be cleared for fragmented frames (except on the last fragment) 614 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 615 * that a frame can be transmitted while the queues are stopped for 616 * off-channel operation. 617 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 618 * used to indicate that a pending frame requires TX processing before 619 * it can be sent out. 620 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 621 * used to indicate that a frame was already retried due to PS 622 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 623 * used to indicate frame should not be encrypted 624 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 625 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 626 * be sent although the station is in powersave mode. 627 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 628 * transmit function after the current frame, this can be used 629 * by drivers to kick the DMA queue only if unset or when the 630 * queue gets full. 631 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 632 * after TX status because the destination was asleep, it must not 633 * be modified again (no seqno assignment, crypto, etc.) 634 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 635 * code for connection establishment, this indicates that its status 636 * should kick the MLME state machine. 637 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 638 * MLME command (internal to mac80211 to figure out whether to send TX 639 * status to user space) 640 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 641 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 642 * frame and selects the maximum number of streams that it can use. 643 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 644 * the off-channel channel when a remain-on-channel offload is done 645 * in hardware -- normal packets still flow and are expected to be 646 * handled properly by the device. 647 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 648 * testing. It will be sent out with incorrect Michael MIC key to allow 649 * TKIP countermeasures to be tested. 650 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 651 * This flag is actually used for management frame especially for P2P 652 * frames not being sent at CCK rate in 2GHz band. 653 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 654 * when its status is reported the service period ends. For frames in 655 * an SP that mac80211 transmits, it is already set; for driver frames 656 * the driver may set this flag. It is also used to do the same for 657 * PS-Poll responses. 658 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 659 * This flag is used to send nullfunc frame at minimum rate when 660 * the nullfunc is used for connection monitoring purpose. 661 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 662 * would be fragmented by size (this is optional, only used for 663 * monitor injection). 664 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with 665 * IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without 666 * any errors (like issues specific to the driver/HW). 667 * This flag must not be set for frames that don't request no-ack 668 * behaviour with IEEE80211_TX_CTL_NO_ACK. 669 * 670 * Note: If you have to add new flags to the enumeration, then don't 671 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 672 */ 673 enum mac80211_tx_info_flags { 674 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 675 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 676 IEEE80211_TX_CTL_NO_ACK = BIT(2), 677 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 678 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 679 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 680 IEEE80211_TX_CTL_AMPDU = BIT(6), 681 IEEE80211_TX_CTL_INJECTED = BIT(7), 682 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 683 IEEE80211_TX_STAT_ACK = BIT(9), 684 IEEE80211_TX_STAT_AMPDU = BIT(10), 685 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 686 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 687 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 688 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 689 IEEE80211_TX_INTFL_RETRIED = BIT(15), 690 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 691 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 692 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 693 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 694 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 695 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 696 IEEE80211_TX_CTL_LDPC = BIT(22), 697 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 698 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 699 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 700 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 701 IEEE80211_TX_STATUS_EOSP = BIT(28), 702 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 703 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 704 IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31), 705 }; 706 707 #define IEEE80211_TX_CTL_STBC_SHIFT 23 708 709 /** 710 * enum mac80211_tx_control_flags - flags to describe transmit control 711 * 712 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 713 * protocol frame (e.g. EAP) 714 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll 715 * frame (PS-Poll or uAPSD). 716 * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information 717 * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame 718 * @IEEE80211_TX_CTRL_FAST_XMIT: This frame is going through the fast_xmit path 719 * 720 * These flags are used in tx_info->control.flags. 721 */ 722 enum mac80211_tx_control_flags { 723 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 724 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), 725 IEEE80211_TX_CTRL_RATE_INJECT = BIT(2), 726 IEEE80211_TX_CTRL_AMSDU = BIT(3), 727 IEEE80211_TX_CTRL_FAST_XMIT = BIT(4), 728 }; 729 730 /* 731 * This definition is used as a mask to clear all temporary flags, which are 732 * set by the tx handlers for each transmission attempt by the mac80211 stack. 733 */ 734 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 735 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 736 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 737 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 738 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 739 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 740 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 741 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 742 743 /** 744 * enum mac80211_rate_control_flags - per-rate flags set by the 745 * Rate Control algorithm. 746 * 747 * These flags are set by the Rate control algorithm for each rate during tx, 748 * in the @flags member of struct ieee80211_tx_rate. 749 * 750 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 751 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 752 * This is set if the current BSS requires ERP protection. 753 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 754 * @IEEE80211_TX_RC_MCS: HT rate. 755 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 756 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 757 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 758 * Greenfield mode. 759 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 760 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 761 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 762 * (80+80 isn't supported yet) 763 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 764 * adjacent 20 MHz channels, if the current channel type is 765 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 766 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 767 */ 768 enum mac80211_rate_control_flags { 769 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 770 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 771 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 772 773 /* rate index is an HT/VHT MCS instead of an index */ 774 IEEE80211_TX_RC_MCS = BIT(3), 775 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 776 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 777 IEEE80211_TX_RC_DUP_DATA = BIT(6), 778 IEEE80211_TX_RC_SHORT_GI = BIT(7), 779 IEEE80211_TX_RC_VHT_MCS = BIT(8), 780 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 781 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 782 }; 783 784 785 /* there are 40 bytes if you don't need the rateset to be kept */ 786 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 787 788 /* if you do need the rateset, then you have less space */ 789 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 790 791 /* maximum number of rate stages */ 792 #define IEEE80211_TX_MAX_RATES 4 793 794 /* maximum number of rate table entries */ 795 #define IEEE80211_TX_RATE_TABLE_SIZE 4 796 797 /** 798 * struct ieee80211_tx_rate - rate selection/status 799 * 800 * @idx: rate index to attempt to send with 801 * @flags: rate control flags (&enum mac80211_rate_control_flags) 802 * @count: number of tries in this rate before going to the next rate 803 * 804 * A value of -1 for @idx indicates an invalid rate and, if used 805 * in an array of retry rates, that no more rates should be tried. 806 * 807 * When used for transmit status reporting, the driver should 808 * always report the rate along with the flags it used. 809 * 810 * &struct ieee80211_tx_info contains an array of these structs 811 * in the control information, and it will be filled by the rate 812 * control algorithm according to what should be sent. For example, 813 * if this array contains, in the format { <idx>, <count> } the 814 * information 815 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 816 * then this means that the frame should be transmitted 817 * up to twice at rate 3, up to twice at rate 2, and up to four 818 * times at rate 1 if it doesn't get acknowledged. Say it gets 819 * acknowledged by the peer after the fifth attempt, the status 820 * information should then contain 821 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 822 * since it was transmitted twice at rate 3, twice at rate 2 823 * and once at rate 1 after which we received an acknowledgement. 824 */ 825 struct ieee80211_tx_rate { 826 s8 idx; 827 u16 count:5, 828 flags:11; 829 } __packed; 830 831 #define IEEE80211_MAX_TX_RETRY 31 832 833 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 834 u8 mcs, u8 nss) 835 { 836 WARN_ON(mcs & ~0xF); 837 WARN_ON((nss - 1) & ~0x7); 838 rate->idx = ((nss - 1) << 4) | mcs; 839 } 840 841 static inline u8 842 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 843 { 844 return rate->idx & 0xF; 845 } 846 847 static inline u8 848 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 849 { 850 return (rate->idx >> 4) + 1; 851 } 852 853 /** 854 * struct ieee80211_tx_info - skb transmit information 855 * 856 * This structure is placed in skb->cb for three uses: 857 * (1) mac80211 TX control - mac80211 tells the driver what to do 858 * (2) driver internal use (if applicable) 859 * (3) TX status information - driver tells mac80211 what happened 860 * 861 * @flags: transmit info flags, defined above 862 * @band: the band to transmit on (use for checking for races) 863 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 864 * @ack_frame_id: internal frame ID for TX status, used internally 865 * @control: union for control data 866 * @status: union for status data 867 * @driver_data: array of driver_data pointers 868 * @ampdu_ack_len: number of acked aggregated frames. 869 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 870 * @ampdu_len: number of aggregated frames. 871 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 872 * @ack_signal: signal strength of the ACK frame 873 */ 874 struct ieee80211_tx_info { 875 /* common information */ 876 u32 flags; 877 u8 band; 878 879 u8 hw_queue; 880 881 u16 ack_frame_id; 882 883 union { 884 struct { 885 union { 886 /* rate control */ 887 struct { 888 struct ieee80211_tx_rate rates[ 889 IEEE80211_TX_MAX_RATES]; 890 s8 rts_cts_rate_idx; 891 u8 use_rts:1; 892 u8 use_cts_prot:1; 893 u8 short_preamble:1; 894 u8 skip_table:1; 895 /* 2 bytes free */ 896 }; 897 /* only needed before rate control */ 898 unsigned long jiffies; 899 }; 900 /* NB: vif can be NULL for injected frames */ 901 union { 902 /* NB: vif can be NULL for injected frames */ 903 struct ieee80211_vif *vif; 904 905 /* When packets are enqueued on txq it's easy 906 * to re-construct the vif pointer. There's no 907 * more space in tx_info so it can be used to 908 * store the necessary enqueue time for packet 909 * sojourn time computation. 910 */ 911 codel_time_t enqueue_time; 912 }; 913 struct ieee80211_key_conf *hw_key; 914 u32 flags; 915 /* 4 bytes free */ 916 } control; 917 struct { 918 u64 cookie; 919 } ack; 920 struct { 921 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 922 s32 ack_signal; 923 u8 ampdu_ack_len; 924 u8 ampdu_len; 925 u8 antenna; 926 u16 tx_time; 927 void *status_driver_data[19 / sizeof(void *)]; 928 } status; 929 struct { 930 struct ieee80211_tx_rate driver_rates[ 931 IEEE80211_TX_MAX_RATES]; 932 u8 pad[4]; 933 934 void *rate_driver_data[ 935 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 936 }; 937 void *driver_data[ 938 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 939 }; 940 }; 941 942 /** 943 * struct ieee80211_scan_ies - descriptors for different blocks of IEs 944 * 945 * This structure is used to point to different blocks of IEs in HW scan 946 * and scheduled scan. These blocks contain the IEs passed by userspace 947 * and the ones generated by mac80211. 948 * 949 * @ies: pointers to band specific IEs. 950 * @len: lengths of band_specific IEs. 951 * @common_ies: IEs for all bands (especially vendor specific ones) 952 * @common_ie_len: length of the common_ies 953 */ 954 struct ieee80211_scan_ies { 955 const u8 *ies[NUM_NL80211_BANDS]; 956 size_t len[NUM_NL80211_BANDS]; 957 const u8 *common_ies; 958 size_t common_ie_len; 959 }; 960 961 962 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 963 { 964 return (struct ieee80211_tx_info *)skb->cb; 965 } 966 967 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 968 { 969 return (struct ieee80211_rx_status *)skb->cb; 970 } 971 972 /** 973 * ieee80211_tx_info_clear_status - clear TX status 974 * 975 * @info: The &struct ieee80211_tx_info to be cleared. 976 * 977 * When the driver passes an skb back to mac80211, it must report 978 * a number of things in TX status. This function clears everything 979 * in the TX status but the rate control information (it does clear 980 * the count since you need to fill that in anyway). 981 * 982 * NOTE: You can only use this function if you do NOT use 983 * info->driver_data! Use info->rate_driver_data 984 * instead if you need only the less space that allows. 985 */ 986 static inline void 987 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 988 { 989 int i; 990 991 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 992 offsetof(struct ieee80211_tx_info, control.rates)); 993 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 994 offsetof(struct ieee80211_tx_info, driver_rates)); 995 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 996 /* clear the rate counts */ 997 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 998 info->status.rates[i].count = 0; 999 1000 BUILD_BUG_ON( 1001 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 1002 memset(&info->status.ampdu_ack_len, 0, 1003 sizeof(struct ieee80211_tx_info) - 1004 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 1005 } 1006 1007 1008 /** 1009 * enum mac80211_rx_flags - receive flags 1010 * 1011 * These flags are used with the @flag member of &struct ieee80211_rx_status. 1012 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 1013 * Use together with %RX_FLAG_MMIC_STRIPPED. 1014 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 1015 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 1016 * verification has been done by the hardware. 1017 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 1018 * If this flag is set, the stack cannot do any replay detection 1019 * hence the driver or hardware will have to do that. 1020 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this 1021 * flag indicates that the PN was verified for replay protection. 1022 * Note that this flag is also currently only supported when a frame 1023 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) 1024 * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did 1025 * de-duplication by itself. 1026 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 1027 * the frame. 1028 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 1029 * the frame. 1030 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 1031 * field) is valid and contains the time the first symbol of the MPDU 1032 * was received. This is useful in monitor mode and for proper IBSS 1033 * merging. 1034 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 1035 * field) is valid and contains the time the last symbol of the MPDU 1036 * (including FCS) was received. 1037 * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime 1038 * field) is valid and contains the time the SYNC preamble was received. 1039 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 1040 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 1041 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 1042 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 1043 * @RX_FLAG_SHORT_GI: Short guard interval was used 1044 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 1045 * Valid only for data frames (mainly A-MPDU) 1046 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 1047 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 1048 * to hw.radiotap_mcs_details to advertise that fact 1049 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 1050 * number (@ampdu_reference) must be populated and be a distinct number for 1051 * each A-MPDU 1052 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 1053 * subframes of a single A-MPDU 1054 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 1055 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 1056 * on this subframe 1057 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 1058 * is stored in the @ampdu_delimiter_crc field) 1059 * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was 1060 * done by the hardware 1061 * @RX_FLAG_LDPC: LDPC was used 1062 * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without 1063 * processing it in any regular way. 1064 * This is useful if drivers offload some frames but still want to report 1065 * them for sniffing purposes. 1066 * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except 1067 * monitor interfaces. 1068 * This is useful if drivers offload some frames but still want to report 1069 * them for sniffing purposes. 1070 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 1071 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 1072 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 1073 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 1074 * subframes instead of a one huge frame for performance reasons. 1075 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 1076 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 1077 * the 3rd (last) one must not have this flag set. The flag is used to 1078 * deal with retransmission/duplication recovery properly since A-MSDU 1079 * subframes share the same sequence number. Reported subframes can be 1080 * either regular MSDU or singly A-MSDUs. Subframes must not be 1081 * interleaved with other frames. 1082 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific 1083 * radiotap data in the skb->data (before the frame) as described by 1084 * the &struct ieee80211_vendor_radiotap. 1085 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. 1086 * This is used for AMSDU subframes which can have the same PN as 1087 * the first subframe. 1088 */ 1089 enum mac80211_rx_flags { 1090 RX_FLAG_MMIC_ERROR = BIT(0), 1091 RX_FLAG_DECRYPTED = BIT(1), 1092 RX_FLAG_MACTIME_PLCP_START = BIT(2), 1093 RX_FLAG_MMIC_STRIPPED = BIT(3), 1094 RX_FLAG_IV_STRIPPED = BIT(4), 1095 RX_FLAG_FAILED_FCS_CRC = BIT(5), 1096 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 1097 RX_FLAG_MACTIME_START = BIT(7), 1098 RX_FLAG_SHORTPRE = BIT(8), 1099 RX_FLAG_HT = BIT(9), 1100 RX_FLAG_40MHZ = BIT(10), 1101 RX_FLAG_SHORT_GI = BIT(11), 1102 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 1103 RX_FLAG_HT_GF = BIT(13), 1104 RX_FLAG_AMPDU_DETAILS = BIT(14), 1105 RX_FLAG_PN_VALIDATED = BIT(15), 1106 RX_FLAG_DUP_VALIDATED = BIT(16), 1107 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 1108 RX_FLAG_AMPDU_IS_LAST = BIT(18), 1109 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 1110 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 1111 RX_FLAG_MACTIME_END = BIT(21), 1112 RX_FLAG_VHT = BIT(22), 1113 RX_FLAG_LDPC = BIT(23), 1114 RX_FLAG_ONLY_MONITOR = BIT(24), 1115 RX_FLAG_SKIP_MONITOR = BIT(25), 1116 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 1117 RX_FLAG_10MHZ = BIT(28), 1118 RX_FLAG_5MHZ = BIT(29), 1119 RX_FLAG_AMSDU_MORE = BIT(30), 1120 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), 1121 RX_FLAG_MIC_STRIPPED = BIT_ULL(32), 1122 RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), 1123 }; 1124 1125 #define RX_FLAG_STBC_SHIFT 26 1126 1127 /** 1128 * enum mac80211_rx_vht_flags - receive VHT flags 1129 * 1130 * These flags are used with the @vht_flag member of 1131 * &struct ieee80211_rx_status. 1132 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 1133 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 1134 * @RX_VHT_FLAG_BF: packet was beamformed 1135 */ 1136 1137 enum mac80211_rx_vht_flags { 1138 RX_VHT_FLAG_80MHZ = BIT(0), 1139 RX_VHT_FLAG_160MHZ = BIT(1), 1140 RX_VHT_FLAG_BF = BIT(2), 1141 }; 1142 1143 /** 1144 * struct ieee80211_rx_status - receive status 1145 * 1146 * The low-level driver should provide this information (the subset 1147 * supported by hardware) to the 802.11 code with each received 1148 * frame, in the skb's control buffer (cb). 1149 * 1150 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 1151 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 1152 * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is 1153 * needed only for beacons and probe responses that update the scan cache. 1154 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 1155 * it but can store it and pass it back to the driver for synchronisation 1156 * @band: the active band when this frame was received 1157 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 1158 * This field must be set for management frames, but isn't strictly needed 1159 * for data (other) frames - for those it only affects radiotap reporting. 1160 * @signal: signal strength when receiving this frame, either in dBm, in dB or 1161 * unspecified depending on the hardware capabilities flags 1162 * @IEEE80211_HW_SIGNAL_* 1163 * @chains: bitmask of receive chains for which separate signal strength 1164 * values were filled. 1165 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 1166 * support dB or unspecified units) 1167 * @antenna: antenna used 1168 * @rate_idx: index of data rate into band's supported rates or MCS index if 1169 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 1170 * @vht_nss: number of streams (VHT only) 1171 * @flag: %RX_FLAG_* 1172 * @vht_flag: %RX_VHT_FLAG_* 1173 * @rx_flags: internal RX flags for mac80211 1174 * @ampdu_reference: A-MPDU reference number, must be a different value for 1175 * each A-MPDU but the same for each subframe within one A-MPDU 1176 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 1177 */ 1178 struct ieee80211_rx_status { 1179 u64 mactime; 1180 u64 boottime_ns; 1181 u32 device_timestamp; 1182 u32 ampdu_reference; 1183 u64 flag; 1184 u16 freq; 1185 u8 vht_flag; 1186 u8 rate_idx; 1187 u8 vht_nss; 1188 u8 rx_flags; 1189 u8 band; 1190 u8 antenna; 1191 s8 signal; 1192 u8 chains; 1193 s8 chain_signal[IEEE80211_MAX_CHAINS]; 1194 u8 ampdu_delimiter_crc; 1195 }; 1196 1197 /** 1198 * struct ieee80211_vendor_radiotap - vendor radiotap data information 1199 * @present: presence bitmap for this vendor namespace 1200 * (this could be extended in the future if any vendor needs more 1201 * bits, the radiotap spec does allow for that) 1202 * @align: radiotap vendor namespace alignment. This defines the needed 1203 * alignment for the @data field below, not for the vendor namespace 1204 * description itself (which has a fixed 2-byte alignment) 1205 * Must be a power of two, and be set to at least 1! 1206 * @oui: radiotap vendor namespace OUI 1207 * @subns: radiotap vendor sub namespace 1208 * @len: radiotap vendor sub namespace skip length, if alignment is done 1209 * then that's added to this, i.e. this is only the length of the 1210 * @data field. 1211 * @pad: number of bytes of padding after the @data, this exists so that 1212 * the skb data alignment can be preserved even if the data has odd 1213 * length 1214 * @data: the actual vendor namespace data 1215 * 1216 * This struct, including the vendor data, goes into the skb->data before 1217 * the 802.11 header. It's split up in mac80211 using the align/oui/subns 1218 * data. 1219 */ 1220 struct ieee80211_vendor_radiotap { 1221 u32 present; 1222 u8 align; 1223 u8 oui[3]; 1224 u8 subns; 1225 u8 pad; 1226 u16 len; 1227 u8 data[]; 1228 } __packed; 1229 1230 /** 1231 * enum ieee80211_conf_flags - configuration flags 1232 * 1233 * Flags to define PHY configuration options 1234 * 1235 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 1236 * to determine for example whether to calculate timestamps for packets 1237 * or not, do not use instead of filter flags! 1238 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 1239 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 1240 * meaning that the hardware still wakes up for beacons, is able to 1241 * transmit frames and receive the possible acknowledgment frames. 1242 * Not to be confused with hardware specific wakeup/sleep states, 1243 * driver is responsible for that. See the section "Powersave support" 1244 * for more. 1245 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 1246 * the driver should be prepared to handle configuration requests but 1247 * may turn the device off as much as possible. Typically, this flag will 1248 * be set when an interface is set UP but not associated or scanning, but 1249 * it can also be unset in that case when monitor interfaces are active. 1250 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 1251 * operating channel. 1252 */ 1253 enum ieee80211_conf_flags { 1254 IEEE80211_CONF_MONITOR = (1<<0), 1255 IEEE80211_CONF_PS = (1<<1), 1256 IEEE80211_CONF_IDLE = (1<<2), 1257 IEEE80211_CONF_OFFCHANNEL = (1<<3), 1258 }; 1259 1260 1261 /** 1262 * enum ieee80211_conf_changed - denotes which configuration changed 1263 * 1264 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 1265 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 1266 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 1267 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 1268 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 1269 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 1270 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 1271 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 1272 * Note that this is only valid if channel contexts are not used, 1273 * otherwise each channel context has the number of chains listed. 1274 */ 1275 enum ieee80211_conf_changed { 1276 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 1277 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 1278 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 1279 IEEE80211_CONF_CHANGE_PS = BIT(4), 1280 IEEE80211_CONF_CHANGE_POWER = BIT(5), 1281 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 1282 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 1283 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 1284 }; 1285 1286 /** 1287 * enum ieee80211_smps_mode - spatial multiplexing power save mode 1288 * 1289 * @IEEE80211_SMPS_AUTOMATIC: automatic 1290 * @IEEE80211_SMPS_OFF: off 1291 * @IEEE80211_SMPS_STATIC: static 1292 * @IEEE80211_SMPS_DYNAMIC: dynamic 1293 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1294 */ 1295 enum ieee80211_smps_mode { 1296 IEEE80211_SMPS_AUTOMATIC, 1297 IEEE80211_SMPS_OFF, 1298 IEEE80211_SMPS_STATIC, 1299 IEEE80211_SMPS_DYNAMIC, 1300 1301 /* keep last */ 1302 IEEE80211_SMPS_NUM_MODES, 1303 }; 1304 1305 /** 1306 * struct ieee80211_conf - configuration of the device 1307 * 1308 * This struct indicates how the driver shall configure the hardware. 1309 * 1310 * @flags: configuration flags defined above 1311 * 1312 * @listen_interval: listen interval in units of beacon interval 1313 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1314 * in power saving. Power saving will not be enabled until a beacon 1315 * has been received and the DTIM period is known. 1316 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1317 * powersave documentation below. This variable is valid only when 1318 * the CONF_PS flag is set. 1319 * 1320 * @power_level: requested transmit power (in dBm), backward compatibility 1321 * value only that is set to the minimum of all interfaces 1322 * 1323 * @chandef: the channel definition to tune to 1324 * @radar_enabled: whether radar detection is enabled 1325 * 1326 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1327 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1328 * but actually means the number of transmissions not the number of retries 1329 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1330 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1331 * number of transmissions not the number of retries 1332 * 1333 * @smps_mode: spatial multiplexing powersave mode; note that 1334 * %IEEE80211_SMPS_STATIC is used when the device is not 1335 * configured for an HT channel. 1336 * Note that this is only valid if channel contexts are not used, 1337 * otherwise each channel context has the number of chains listed. 1338 */ 1339 struct ieee80211_conf { 1340 u32 flags; 1341 int power_level, dynamic_ps_timeout; 1342 1343 u16 listen_interval; 1344 u8 ps_dtim_period; 1345 1346 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1347 1348 struct cfg80211_chan_def chandef; 1349 bool radar_enabled; 1350 enum ieee80211_smps_mode smps_mode; 1351 }; 1352 1353 /** 1354 * struct ieee80211_channel_switch - holds the channel switch data 1355 * 1356 * The information provided in this structure is required for channel switch 1357 * operation. 1358 * 1359 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1360 * Function (TSF) timer when the frame containing the channel switch 1361 * announcement was received. This is simply the rx.mactime parameter 1362 * the driver passed into mac80211. 1363 * @device_timestamp: arbitrary timestamp for the device, this is the 1364 * rx.device_timestamp parameter the driver passed to mac80211. 1365 * @block_tx: Indicates whether transmission must be blocked before the 1366 * scheduled channel switch, as indicated by the AP. 1367 * @chandef: the new channel to switch to 1368 * @count: the number of TBTT's until the channel switch event 1369 */ 1370 struct ieee80211_channel_switch { 1371 u64 timestamp; 1372 u32 device_timestamp; 1373 bool block_tx; 1374 struct cfg80211_chan_def chandef; 1375 u8 count; 1376 }; 1377 1378 /** 1379 * enum ieee80211_vif_flags - virtual interface flags 1380 * 1381 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1382 * on this virtual interface to avoid unnecessary CPU wakeups 1383 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1384 * monitoring on this virtual interface -- i.e. it can monitor 1385 * connection quality related parameters, such as the RSSI level and 1386 * provide notifications if configured trigger levels are reached. 1387 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this 1388 * interface. This flag should be set during interface addition, 1389 * but may be set/cleared as late as authentication to an AP. It is 1390 * only valid for managed/station mode interfaces. 1391 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes 1392 * and send P2P_PS notification to the driver if NOA changed, even 1393 * this is not pure P2P vif. 1394 */ 1395 enum ieee80211_vif_flags { 1396 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1397 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1398 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), 1399 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), 1400 }; 1401 1402 /** 1403 * struct ieee80211_vif - per-interface data 1404 * 1405 * Data in this structure is continually present for driver 1406 * use during the life of a virtual interface. 1407 * 1408 * @type: type of this virtual interface 1409 * @bss_conf: BSS configuration for this interface, either our own 1410 * or the BSS we're associated to 1411 * @addr: address of this interface 1412 * @p2p: indicates whether this AP or STA interface is a p2p 1413 * interface, i.e. a GO or p2p-sta respectively 1414 * @csa_active: marks whether a channel switch is going on. Internally it is 1415 * write-protected by sdata_lock and local->mtx so holding either is fine 1416 * for read access. 1417 * @mu_mimo_owner: indicates interface owns MU-MIMO capability 1418 * @driver_flags: flags/capabilities the driver has for this interface, 1419 * these need to be set (or cleared) when the interface is added 1420 * or, if supported by the driver, the interface type is changed 1421 * at runtime, mac80211 will never touch this field 1422 * @hw_queue: hardware queue for each AC 1423 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1424 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1425 * when it is not assigned. This pointer is RCU-protected due to the TX 1426 * path needing to access it; even though the netdev carrier will always 1427 * be off when it is %NULL there can still be races and packets could be 1428 * processed after it switches back to %NULL. 1429 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1430 * interface debug files. Note that it will be NULL for the virtual 1431 * monitor interface (if that is requested.) 1432 * @probe_req_reg: probe requests should be reported to mac80211 for this 1433 * interface. 1434 * @drv_priv: data area for driver use, will always be aligned to 1435 * sizeof(void *). 1436 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) 1437 */ 1438 struct ieee80211_vif { 1439 enum nl80211_iftype type; 1440 struct ieee80211_bss_conf bss_conf; 1441 u8 addr[ETH_ALEN]; 1442 bool p2p; 1443 bool csa_active; 1444 bool mu_mimo_owner; 1445 1446 u8 cab_queue; 1447 u8 hw_queue[IEEE80211_NUM_ACS]; 1448 1449 struct ieee80211_txq *txq; 1450 1451 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1452 1453 u32 driver_flags; 1454 1455 #ifdef CONFIG_MAC80211_DEBUGFS 1456 struct dentry *debugfs_dir; 1457 #endif 1458 1459 unsigned int probe_req_reg; 1460 1461 /* must be last */ 1462 u8 drv_priv[0] __aligned(sizeof(void *)); 1463 }; 1464 1465 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1466 { 1467 #ifdef CONFIG_MAC80211_MESH 1468 return vif->type == NL80211_IFTYPE_MESH_POINT; 1469 #endif 1470 return false; 1471 } 1472 1473 /** 1474 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1475 * @wdev: the wdev to get the vif for 1476 * 1477 * This can be used by mac80211 drivers with direct cfg80211 APIs 1478 * (like the vendor commands) that get a wdev. 1479 * 1480 * Note that this function may return %NULL if the given wdev isn't 1481 * associated with a vif that the driver knows about (e.g. monitor 1482 * or AP_VLAN interfaces.) 1483 */ 1484 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1485 1486 /** 1487 * ieee80211_vif_to_wdev - return a wdev struct from a vif 1488 * @vif: the vif to get the wdev for 1489 * 1490 * This can be used by mac80211 drivers with direct cfg80211 APIs 1491 * (like the vendor commands) that needs to get the wdev for a vif. 1492 * 1493 * Note that this function may return %NULL if the given wdev isn't 1494 * associated with a vif that the driver knows about (e.g. monitor 1495 * or AP_VLAN interfaces.) 1496 */ 1497 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); 1498 1499 /** 1500 * enum ieee80211_key_flags - key flags 1501 * 1502 * These flags are used for communication about keys between the driver 1503 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1504 * 1505 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1506 * driver to indicate that it requires IV generation for this 1507 * particular key. Setting this flag does not necessarily mean that SKBs 1508 * will have sufficient tailroom for ICV or MIC. 1509 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1510 * the driver for a TKIP key if it requires Michael MIC 1511 * generation in software. 1512 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1513 * that the key is pairwise rather then a shared key. 1514 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1515 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames 1516 * (MFP) to be done in software. 1517 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1518 * if space should be prepared for the IV, but the IV 1519 * itself should not be generated. Do not set together with 1520 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does 1521 * not necessarily mean that SKBs will have sufficient tailroom for ICV or 1522 * MIC. 1523 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1524 * management frames. The flag can help drivers that have a hardware 1525 * crypto implementation that doesn't deal with management frames 1526 * properly by allowing them to not upload the keys to hardware and 1527 * fall back to software crypto. Note that this flag deals only with 1528 * RX, if your crypto engine can't deal with TX you can also set the 1529 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1530 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1531 * driver for a CCMP/GCMP key to indicate that is requires IV generation 1532 * only for managment frames (MFP). 1533 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the 1534 * driver for a key to indicate that sufficient tailroom must always 1535 * be reserved for ICV or MIC, even when HW encryption is enabled. 1536 */ 1537 enum ieee80211_key_flags { 1538 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1539 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1540 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1541 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1542 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1543 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1544 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1545 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), 1546 }; 1547 1548 /** 1549 * struct ieee80211_key_conf - key information 1550 * 1551 * This key information is given by mac80211 to the driver by 1552 * the set_key() callback in &struct ieee80211_ops. 1553 * 1554 * @hw_key_idx: To be set by the driver, this is the key index the driver 1555 * wants to be given when a frame is transmitted and needs to be 1556 * encrypted in hardware. 1557 * @cipher: The key's cipher suite selector. 1558 * @tx_pn: PN used for TX keys, may be used by the driver as well if it 1559 * needs to do software PN assignment by itself (e.g. due to TSO) 1560 * @flags: key flags, see &enum ieee80211_key_flags. 1561 * @keyidx: the key index (0-3) 1562 * @keylen: key material length 1563 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1564 * data block: 1565 * - Temporal Encryption Key (128 bits) 1566 * - Temporal Authenticator Tx MIC Key (64 bits) 1567 * - Temporal Authenticator Rx MIC Key (64 bits) 1568 * @icv_len: The ICV length for this key type 1569 * @iv_len: The IV length for this key type 1570 */ 1571 struct ieee80211_key_conf { 1572 atomic64_t tx_pn; 1573 u32 cipher; 1574 u8 icv_len; 1575 u8 iv_len; 1576 u8 hw_key_idx; 1577 u8 flags; 1578 s8 keyidx; 1579 u8 keylen; 1580 u8 key[0]; 1581 }; 1582 1583 #define IEEE80211_MAX_PN_LEN 16 1584 1585 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff)) 1586 #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff)) 1587 1588 /** 1589 * struct ieee80211_key_seq - key sequence counter 1590 * 1591 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 1592 * @ccmp: PN data, most significant byte first (big endian, 1593 * reverse order than in packet) 1594 * @aes_cmac: PN data, most significant byte first (big endian, 1595 * reverse order than in packet) 1596 * @aes_gmac: PN data, most significant byte first (big endian, 1597 * reverse order than in packet) 1598 * @gcmp: PN data, most significant byte first (big endian, 1599 * reverse order than in packet) 1600 * @hw: data for HW-only (e.g. cipher scheme) keys 1601 */ 1602 struct ieee80211_key_seq { 1603 union { 1604 struct { 1605 u32 iv32; 1606 u16 iv16; 1607 } tkip; 1608 struct { 1609 u8 pn[6]; 1610 } ccmp; 1611 struct { 1612 u8 pn[6]; 1613 } aes_cmac; 1614 struct { 1615 u8 pn[6]; 1616 } aes_gmac; 1617 struct { 1618 u8 pn[6]; 1619 } gcmp; 1620 struct { 1621 u8 seq[IEEE80211_MAX_PN_LEN]; 1622 u8 seq_len; 1623 } hw; 1624 }; 1625 }; 1626 1627 /** 1628 * struct ieee80211_cipher_scheme - cipher scheme 1629 * 1630 * This structure contains a cipher scheme information defining 1631 * the secure packet crypto handling. 1632 * 1633 * @cipher: a cipher suite selector 1634 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1635 * @hdr_len: a length of a security header used the cipher 1636 * @pn_len: a length of a packet number in the security header 1637 * @pn_off: an offset of pn from the beginning of the security header 1638 * @key_idx_off: an offset of key index byte in the security header 1639 * @key_idx_mask: a bit mask of key_idx bits 1640 * @key_idx_shift: a bit shift needed to get key_idx 1641 * key_idx value calculation: 1642 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1643 * @mic_len: a mic length in bytes 1644 */ 1645 struct ieee80211_cipher_scheme { 1646 u32 cipher; 1647 u16 iftype; 1648 u8 hdr_len; 1649 u8 pn_len; 1650 u8 pn_off; 1651 u8 key_idx_off; 1652 u8 key_idx_mask; 1653 u8 key_idx_shift; 1654 u8 mic_len; 1655 }; 1656 1657 /** 1658 * enum set_key_cmd - key command 1659 * 1660 * Used with the set_key() callback in &struct ieee80211_ops, this 1661 * indicates whether a key is being removed or added. 1662 * 1663 * @SET_KEY: a key is set 1664 * @DISABLE_KEY: a key must be disabled 1665 */ 1666 enum set_key_cmd { 1667 SET_KEY, DISABLE_KEY, 1668 }; 1669 1670 /** 1671 * enum ieee80211_sta_state - station state 1672 * 1673 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1674 * this is a special state for add/remove transitions 1675 * @IEEE80211_STA_NONE: station exists without special state 1676 * @IEEE80211_STA_AUTH: station is authenticated 1677 * @IEEE80211_STA_ASSOC: station is associated 1678 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1679 */ 1680 enum ieee80211_sta_state { 1681 /* NOTE: These need to be ordered correctly! */ 1682 IEEE80211_STA_NOTEXIST, 1683 IEEE80211_STA_NONE, 1684 IEEE80211_STA_AUTH, 1685 IEEE80211_STA_ASSOC, 1686 IEEE80211_STA_AUTHORIZED, 1687 }; 1688 1689 /** 1690 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1691 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1692 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1693 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1694 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1695 * (including 80+80 MHz) 1696 * 1697 * Implementation note: 20 must be zero to be initialized 1698 * correctly, the values must be sorted. 1699 */ 1700 enum ieee80211_sta_rx_bandwidth { 1701 IEEE80211_STA_RX_BW_20 = 0, 1702 IEEE80211_STA_RX_BW_40, 1703 IEEE80211_STA_RX_BW_80, 1704 IEEE80211_STA_RX_BW_160, 1705 }; 1706 1707 /** 1708 * struct ieee80211_sta_rates - station rate selection table 1709 * 1710 * @rcu_head: RCU head used for freeing the table on update 1711 * @rate: transmit rates/flags to be used by default. 1712 * Overriding entries per-packet is possible by using cb tx control. 1713 */ 1714 struct ieee80211_sta_rates { 1715 struct rcu_head rcu_head; 1716 struct { 1717 s8 idx; 1718 u8 count; 1719 u8 count_cts; 1720 u8 count_rts; 1721 u16 flags; 1722 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1723 }; 1724 1725 /** 1726 * struct ieee80211_sta - station table entry 1727 * 1728 * A station table entry represents a station we are possibly 1729 * communicating with. Since stations are RCU-managed in 1730 * mac80211, any ieee80211_sta pointer you get access to must 1731 * either be protected by rcu_read_lock() explicitly or implicitly, 1732 * or you must take good care to not use such a pointer after a 1733 * call to your sta_remove callback that removed it. 1734 * 1735 * @addr: MAC address 1736 * @aid: AID we assigned to the station if we're an AP 1737 * @supp_rates: Bitmap of supported rates (per band) 1738 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1739 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1740 * @max_rx_aggregation_subframes: maximal amount of frames in a single AMPDU 1741 * that this station is allowed to transmit to us. 1742 * Can be modified by driver. 1743 * @wme: indicates whether the STA supports QoS/WME (if local devices does, 1744 * otherwise always false) 1745 * @drv_priv: data area for driver use, will always be aligned to 1746 * sizeof(void *), size is determined in hw information. 1747 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1748 * if wme is supported. 1749 * @max_sp: max Service Period. Only valid if wme is supported. 1750 * @bandwidth: current bandwidth the station can receive with 1751 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1752 * station can receive at the moment, changed by operating mode 1753 * notifications and capabilities. The value is only valid after 1754 * the station moves to associated state. 1755 * @smps_mode: current SMPS mode (off, static or dynamic) 1756 * @rates: rate control selection table 1757 * @tdls: indicates whether the STA is a TDLS peer 1758 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only 1759 * valid if the STA is a TDLS peer in the first place. 1760 * @mfp: indicates whether the STA uses management frame protection or not. 1761 * @max_amsdu_subframes: indicates the maximal number of MSDUs in a single 1762 * A-MSDU. Taken from the Extended Capabilities element. 0 means 1763 * unlimited. 1764 * @max_amsdu_len: indicates the maximal length of an A-MSDU in bytes. This 1765 * field is always valid for packets with a VHT preamble. For packets 1766 * with a HT preamble, additional limits apply: 1767 * + If the skb is transmitted as part of a BA agreement, the 1768 * A-MSDU maximal size is min(max_amsdu_len, 4065) bytes. 1769 * + If the skb is not part of a BA aggreement, the A-MSDU maximal 1770 * size is min(max_amsdu_len, 7935) bytes. 1771 * Both additional HT limits must be enforced by the low level driver. 1772 * This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2). 1773 * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not. 1774 * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control. 1775 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) 1776 */ 1777 struct ieee80211_sta { 1778 u32 supp_rates[NUM_NL80211_BANDS]; 1779 u8 addr[ETH_ALEN]; 1780 u16 aid; 1781 struct ieee80211_sta_ht_cap ht_cap; 1782 struct ieee80211_sta_vht_cap vht_cap; 1783 u8 max_rx_aggregation_subframes; 1784 bool wme; 1785 u8 uapsd_queues; 1786 u8 max_sp; 1787 u8 rx_nss; 1788 enum ieee80211_sta_rx_bandwidth bandwidth; 1789 enum ieee80211_smps_mode smps_mode; 1790 struct ieee80211_sta_rates __rcu *rates; 1791 bool tdls; 1792 bool tdls_initiator; 1793 bool mfp; 1794 u8 max_amsdu_subframes; 1795 u16 max_amsdu_len; 1796 bool support_p2p_ps; 1797 u16 max_rc_amsdu_len; 1798 1799 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; 1800 1801 /* must be last */ 1802 u8 drv_priv[0] __aligned(sizeof(void *)); 1803 }; 1804 1805 /** 1806 * enum sta_notify_cmd - sta notify command 1807 * 1808 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1809 * indicates if an associated station made a power state transition. 1810 * 1811 * @STA_NOTIFY_SLEEP: a station is now sleeping 1812 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1813 */ 1814 enum sta_notify_cmd { 1815 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1816 }; 1817 1818 /** 1819 * struct ieee80211_tx_control - TX control data 1820 * 1821 * @sta: station table entry, this sta pointer may be NULL and 1822 * it is not allowed to copy the pointer, due to RCU. 1823 */ 1824 struct ieee80211_tx_control { 1825 struct ieee80211_sta *sta; 1826 }; 1827 1828 /** 1829 * struct ieee80211_txq - Software intermediate tx queue 1830 * 1831 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1832 * @sta: station table entry, %NULL for per-vif queue 1833 * @tid: the TID for this queue (unused for per-vif queue) 1834 * @ac: the AC for this queue 1835 * @drv_priv: driver private area, sized by hw->txq_data_size 1836 * 1837 * The driver can obtain packets from this queue by calling 1838 * ieee80211_tx_dequeue(). 1839 */ 1840 struct ieee80211_txq { 1841 struct ieee80211_vif *vif; 1842 struct ieee80211_sta *sta; 1843 u8 tid; 1844 u8 ac; 1845 1846 /* must be last */ 1847 u8 drv_priv[0] __aligned(sizeof(void *)); 1848 }; 1849 1850 /** 1851 * enum ieee80211_hw_flags - hardware flags 1852 * 1853 * These flags are used to indicate hardware capabilities to 1854 * the stack. Generally, flags here should have their meaning 1855 * done in a way that the simplest hardware doesn't need setting 1856 * any particular flags. There are some exceptions to this rule, 1857 * however, so you are advised to review these flags carefully. 1858 * 1859 * @IEEE80211_HW_HAS_RATE_CONTROL: 1860 * The hardware or firmware includes rate control, and cannot be 1861 * controlled by the stack. As such, no rate control algorithm 1862 * should be instantiated, and the TX rate reported to userspace 1863 * will be taken from the TX status instead of the rate control 1864 * algorithm. 1865 * Note that this requires that the driver implement a number of 1866 * callbacks so it has the correct information, it needs to have 1867 * the @set_rts_threshold callback and must look at the BSS config 1868 * @use_cts_prot for G/N protection, @use_short_slot for slot 1869 * timing in 2.4 GHz and @use_short_preamble for preambles for 1870 * CCK frames. 1871 * 1872 * @IEEE80211_HW_RX_INCLUDES_FCS: 1873 * Indicates that received frames passed to the stack include 1874 * the FCS at the end. 1875 * 1876 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1877 * Some wireless LAN chipsets buffer broadcast/multicast frames 1878 * for power saving stations in the hardware/firmware and others 1879 * rely on the host system for such buffering. This option is used 1880 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1881 * multicast frames when there are power saving stations so that 1882 * the driver can fetch them with ieee80211_get_buffered_bc(). 1883 * 1884 * @IEEE80211_HW_SIGNAL_UNSPEC: 1885 * Hardware can provide signal values but we don't know its units. We 1886 * expect values between 0 and @max_signal. 1887 * If possible please provide dB or dBm instead. 1888 * 1889 * @IEEE80211_HW_SIGNAL_DBM: 1890 * Hardware gives signal values in dBm, decibel difference from 1891 * one milliwatt. This is the preferred method since it is standardized 1892 * between different devices. @max_signal does not need to be set. 1893 * 1894 * @IEEE80211_HW_SPECTRUM_MGMT: 1895 * Hardware supports spectrum management defined in 802.11h 1896 * Measurement, Channel Switch, Quieting, TPC 1897 * 1898 * @IEEE80211_HW_AMPDU_AGGREGATION: 1899 * Hardware supports 11n A-MPDU aggregation. 1900 * 1901 * @IEEE80211_HW_SUPPORTS_PS: 1902 * Hardware has power save support (i.e. can go to sleep). 1903 * 1904 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1905 * Hardware requires nullfunc frame handling in stack, implies 1906 * stack support for dynamic PS. 1907 * 1908 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1909 * Hardware has support for dynamic PS. 1910 * 1911 * @IEEE80211_HW_MFP_CAPABLE: 1912 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1913 * 1914 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1915 * Hardware can provide ack status reports of Tx frames to 1916 * the stack. 1917 * 1918 * @IEEE80211_HW_CONNECTION_MONITOR: 1919 * The hardware performs its own connection monitoring, including 1920 * periodic keep-alives to the AP and probing the AP on beacon loss. 1921 * 1922 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1923 * This device needs to get data from beacon before association (i.e. 1924 * dtim_period). 1925 * 1926 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1927 * per-station GTKs as used by IBSS RSN or during fast transition. If 1928 * the device doesn't support per-station GTKs, but can be asked not 1929 * to decrypt group addressed frames, then IBSS RSN support is still 1930 * possible but software crypto will be used. Advertise the wiphy flag 1931 * only in that case. 1932 * 1933 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1934 * autonomously manages the PS status of connected stations. When 1935 * this flag is set mac80211 will not trigger PS mode for connected 1936 * stations based on the PM bit of incoming frames. 1937 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1938 * the PS mode of connected stations. 1939 * 1940 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1941 * setup strictly in HW. mac80211 should not attempt to do this in 1942 * software. 1943 * 1944 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1945 * a virtual monitor interface when monitor interfaces are the only 1946 * active interfaces. 1947 * 1948 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to 1949 * be created. It is expected user-space will create vifs as 1950 * desired (and thus have them named as desired). 1951 * 1952 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the 1953 * crypto algorithms can be done in software - so don't automatically 1954 * try to fall back to it if hardware crypto fails, but do so only if 1955 * the driver returns 1. This also forces the driver to advertise its 1956 * supported cipher suites. 1957 * 1958 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit, 1959 * this currently requires only the ability to calculate the duration 1960 * for frames. 1961 * 1962 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1963 * queue mapping in order to use different queues (not just one per AC) 1964 * for different virtual interfaces. See the doc section on HW queue 1965 * control for more details. 1966 * 1967 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1968 * selection table provided by the rate control algorithm. 1969 * 1970 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1971 * P2P Interface. This will be honoured even if more than one interface 1972 * is supported. 1973 * 1974 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1975 * only, to allow getting TBTT of a DTIM beacon. 1976 * 1977 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1978 * and can cope with CCK rates in an aggregation session (e.g. by not 1979 * using aggregation for such frames.) 1980 * 1981 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1982 * for a single active channel while using channel contexts. When support 1983 * is not enabled the default action is to disconnect when getting the 1984 * CSA frame. 1985 * 1986 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload 1987 * or tailroom of TX skbs without copying them first. 1988 * 1989 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands 1990 * in one command, mac80211 doesn't have to run separate scans per band. 1991 * 1992 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth 1993 * than then BSS bandwidth for a TDLS link on the base channel. 1994 * 1995 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs 1996 * within A-MPDU. 1997 * 1998 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status 1999 * for sent beacons. 2000 * 2001 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each 2002 * station has a unique address, i.e. each station entry can be identified 2003 * by just its MAC address; this prevents, for example, the same station 2004 * from connecting to two virtual AP interfaces at the same time. 2005 * 2006 * @IEEE80211_HW_SUPPORTS_REORDERING_BUFFER: Hardware (or driver) manages the 2007 * reordering buffer internally, guaranteeing mac80211 receives frames in 2008 * order and does not need to manage its own reorder buffer or BA session 2009 * timeout. 2010 * 2011 * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX, 2012 * which implies using per-CPU station statistics. 2013 * 2014 * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated 2015 * A-MSDU frames. Requires software tx queueing and fast-xmit support. 2016 * When not using minstrel/minstrel_ht rate control, the driver must 2017 * limit the maximum A-MSDU size based on the current tx rate by setting 2018 * max_rc_amsdu_len in struct ieee80211_sta. 2019 * 2020 * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list 2021 * skbs, needed for zero-copy software A-MSDU. 2022 * 2023 * @IEEE80211_HW_REPORTS_LOW_ACK: The driver (or firmware) reports low ack event 2024 * by ieee80211_report_low_ack() based on its own algorithm. For such 2025 * drivers, mac80211 packet loss mechanism will not be triggered and driver 2026 * is completely depending on firmware event for station kickout. 2027 * 2028 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays 2029 */ 2030 enum ieee80211_hw_flags { 2031 IEEE80211_HW_HAS_RATE_CONTROL, 2032 IEEE80211_HW_RX_INCLUDES_FCS, 2033 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING, 2034 IEEE80211_HW_SIGNAL_UNSPEC, 2035 IEEE80211_HW_SIGNAL_DBM, 2036 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC, 2037 IEEE80211_HW_SPECTRUM_MGMT, 2038 IEEE80211_HW_AMPDU_AGGREGATION, 2039 IEEE80211_HW_SUPPORTS_PS, 2040 IEEE80211_HW_PS_NULLFUNC_STACK, 2041 IEEE80211_HW_SUPPORTS_DYNAMIC_PS, 2042 IEEE80211_HW_MFP_CAPABLE, 2043 IEEE80211_HW_WANT_MONITOR_VIF, 2044 IEEE80211_HW_NO_AUTO_VIF, 2045 IEEE80211_HW_SW_CRYPTO_CONTROL, 2046 IEEE80211_HW_SUPPORT_FAST_XMIT, 2047 IEEE80211_HW_REPORTS_TX_ACK_STATUS, 2048 IEEE80211_HW_CONNECTION_MONITOR, 2049 IEEE80211_HW_QUEUE_CONTROL, 2050 IEEE80211_HW_SUPPORTS_PER_STA_GTK, 2051 IEEE80211_HW_AP_LINK_PS, 2052 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW, 2053 IEEE80211_HW_SUPPORTS_RC_TABLE, 2054 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF, 2055 IEEE80211_HW_TIMING_BEACON_ONLY, 2056 IEEE80211_HW_SUPPORTS_HT_CCK_RATES, 2057 IEEE80211_HW_CHANCTX_STA_CSA, 2058 IEEE80211_HW_SUPPORTS_CLONED_SKBS, 2059 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, 2060 IEEE80211_HW_TDLS_WIDER_BW, 2061 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU, 2062 IEEE80211_HW_BEACON_TX_STATUS, 2063 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, 2064 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER, 2065 IEEE80211_HW_USES_RSS, 2066 IEEE80211_HW_TX_AMSDU, 2067 IEEE80211_HW_TX_FRAG_LIST, 2068 IEEE80211_HW_REPORTS_LOW_ACK, 2069 2070 /* keep last, obviously */ 2071 NUM_IEEE80211_HW_FLAGS 2072 }; 2073 2074 /** 2075 * struct ieee80211_hw - hardware information and state 2076 * 2077 * This structure contains the configuration and hardware 2078 * information for an 802.11 PHY. 2079 * 2080 * @wiphy: This points to the &struct wiphy allocated for this 2081 * 802.11 PHY. You must fill in the @perm_addr and @dev 2082 * members of this structure using SET_IEEE80211_DEV() 2083 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 2084 * bands (with channels, bitrates) are registered here. 2085 * 2086 * @conf: &struct ieee80211_conf, device configuration, don't use. 2087 * 2088 * @priv: pointer to private area that was allocated for driver use 2089 * along with this structure. 2090 * 2091 * @flags: hardware flags, see &enum ieee80211_hw_flags. 2092 * 2093 * @extra_tx_headroom: headroom to reserve in each transmit skb 2094 * for use by the driver (e.g. for transmit headers.) 2095 * 2096 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 2097 * Can be used by drivers to add extra IEs. 2098 * 2099 * @max_signal: Maximum value for signal (rssi) in RX information, used 2100 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 2101 * 2102 * @max_listen_interval: max listen interval in units of beacon interval 2103 * that HW supports 2104 * 2105 * @queues: number of available hardware transmit queues for 2106 * data packets. WMM/QoS requires at least four, these 2107 * queues need to have configurable access parameters. 2108 * 2109 * @rate_control_algorithm: rate control algorithm for this hardware. 2110 * If unset (NULL), the default algorithm will be used. Must be 2111 * set before calling ieee80211_register_hw(). 2112 * 2113 * @vif_data_size: size (in bytes) of the drv_priv data area 2114 * within &struct ieee80211_vif. 2115 * @sta_data_size: size (in bytes) of the drv_priv data area 2116 * within &struct ieee80211_sta. 2117 * @chanctx_data_size: size (in bytes) of the drv_priv data area 2118 * within &struct ieee80211_chanctx_conf. 2119 * @txq_data_size: size (in bytes) of the drv_priv data area 2120 * within @struct ieee80211_txq. 2121 * 2122 * @max_rates: maximum number of alternate rate retry stages the hw 2123 * can handle. 2124 * @max_report_rates: maximum number of alternate rate retry stages 2125 * the hw can report back. 2126 * @max_rate_tries: maximum number of tries for each stage 2127 * 2128 * @max_rx_aggregation_subframes: maximum buffer size (number of 2129 * sub-frames) to be used for A-MPDU block ack receiver 2130 * aggregation. 2131 * This is only relevant if the device has restrictions on the 2132 * number of subframes, if it relies on mac80211 to do reordering 2133 * it shouldn't be set. 2134 * 2135 * @max_tx_aggregation_subframes: maximum number of subframes in an 2136 * aggregate an HT driver will transmit. Though ADDBA will advertise 2137 * a constant value of 64 as some older APs can crash if the window 2138 * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 2139 * build 002 Jun 18 2012). 2140 * 2141 * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum 2142 * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list. 2143 * 2144 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 2145 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 2146 * 2147 * @radiotap_mcs_details: lists which MCS information can the HW 2148 * reports, by default it is set to _MCS, _GI and _BW but doesn't 2149 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 2150 * adding _BW is supported today. 2151 * 2152 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 2153 * the default is _GI | _BANDWIDTH. 2154 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 2155 * 2156 * @radiotap_timestamp: Information for the radiotap timestamp field; if the 2157 * 'units_pos' member is set to a non-negative value it must be set to 2158 * a combination of a IEEE80211_RADIOTAP_TIMESTAMP_UNIT_* and a 2159 * IEEE80211_RADIOTAP_TIMESTAMP_SPOS_* value, and then the timestamp 2160 * field will be added and populated from the &struct ieee80211_rx_status 2161 * device_timestamp. If the 'accuracy' member is non-negative, it's put 2162 * into the accuracy radiotap field and the accuracy known flag is set. 2163 * 2164 * @netdev_features: netdev features to be set in each netdev created 2165 * from this HW. Note that not all features are usable with mac80211, 2166 * other features will be rejected during HW registration. 2167 * 2168 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 2169 * for each access category if it is uAPSD trigger-enabled and delivery- 2170 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 2171 * Each bit corresponds to different AC. Value '1' in specific bit means 2172 * that corresponding AC is both trigger- and delivery-enabled. '0' means 2173 * neither enabled. 2174 * 2175 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 2176 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 2177 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 2178 * 2179 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 2180 * @cipher_schemes: a pointer to an array of cipher scheme definitions 2181 * supported by HW. 2182 * @max_nan_de_entries: maximum number of NAN DE functions supported by the 2183 * device. 2184 */ 2185 struct ieee80211_hw { 2186 struct ieee80211_conf conf; 2187 struct wiphy *wiphy; 2188 const char *rate_control_algorithm; 2189 void *priv; 2190 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)]; 2191 unsigned int extra_tx_headroom; 2192 unsigned int extra_beacon_tailroom; 2193 int vif_data_size; 2194 int sta_data_size; 2195 int chanctx_data_size; 2196 int txq_data_size; 2197 u16 queues; 2198 u16 max_listen_interval; 2199 s8 max_signal; 2200 u8 max_rates; 2201 u8 max_report_rates; 2202 u8 max_rate_tries; 2203 u8 max_rx_aggregation_subframes; 2204 u8 max_tx_aggregation_subframes; 2205 u8 max_tx_fragments; 2206 u8 offchannel_tx_hw_queue; 2207 u8 radiotap_mcs_details; 2208 u16 radiotap_vht_details; 2209 struct { 2210 int units_pos; 2211 s16 accuracy; 2212 } radiotap_timestamp; 2213 netdev_features_t netdev_features; 2214 u8 uapsd_queues; 2215 u8 uapsd_max_sp_len; 2216 u8 n_cipher_schemes; 2217 const struct ieee80211_cipher_scheme *cipher_schemes; 2218 u8 max_nan_de_entries; 2219 }; 2220 2221 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, 2222 enum ieee80211_hw_flags flg) 2223 { 2224 return test_bit(flg, hw->flags); 2225 } 2226 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg) 2227 2228 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw, 2229 enum ieee80211_hw_flags flg) 2230 { 2231 return __set_bit(flg, hw->flags); 2232 } 2233 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg) 2234 2235 /** 2236 * struct ieee80211_scan_request - hw scan request 2237 * 2238 * @ies: pointers different parts of IEs (in req.ie) 2239 * @req: cfg80211 request. 2240 */ 2241 struct ieee80211_scan_request { 2242 struct ieee80211_scan_ies ies; 2243 2244 /* Keep last */ 2245 struct cfg80211_scan_request req; 2246 }; 2247 2248 /** 2249 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters 2250 * 2251 * @sta: peer this TDLS channel-switch request/response came from 2252 * @chandef: channel referenced in a TDLS channel-switch request 2253 * @action_code: see &enum ieee80211_tdls_actioncode 2254 * @status: channel-switch response status 2255 * @timestamp: time at which the frame was received 2256 * @switch_time: switch-timing parameter received in the frame 2257 * @switch_timeout: switch-timing parameter received in the frame 2258 * @tmpl_skb: TDLS switch-channel response template 2259 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb 2260 */ 2261 struct ieee80211_tdls_ch_sw_params { 2262 struct ieee80211_sta *sta; 2263 struct cfg80211_chan_def *chandef; 2264 u8 action_code; 2265 u32 status; 2266 u32 timestamp; 2267 u16 switch_time; 2268 u16 switch_timeout; 2269 struct sk_buff *tmpl_skb; 2270 u32 ch_sw_tm_ie; 2271 }; 2272 2273 /** 2274 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 2275 * 2276 * @wiphy: the &struct wiphy which we want to query 2277 * 2278 * mac80211 drivers can use this to get to their respective 2279 * &struct ieee80211_hw. Drivers wishing to get to their own private 2280 * structure can then access it via hw->priv. Note that mac802111 drivers should 2281 * not use wiphy_priv() to try to get their private driver structure as this 2282 * is already used internally by mac80211. 2283 * 2284 * Return: The mac80211 driver hw struct of @wiphy. 2285 */ 2286 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 2287 2288 /** 2289 * SET_IEEE80211_DEV - set device for 802.11 hardware 2290 * 2291 * @hw: the &struct ieee80211_hw to set the device for 2292 * @dev: the &struct device of this 802.11 device 2293 */ 2294 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 2295 { 2296 set_wiphy_dev(hw->wiphy, dev); 2297 } 2298 2299 /** 2300 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 2301 * 2302 * @hw: the &struct ieee80211_hw to set the MAC address for 2303 * @addr: the address to set 2304 */ 2305 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, const u8 *addr) 2306 { 2307 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 2308 } 2309 2310 static inline struct ieee80211_rate * 2311 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 2312 const struct ieee80211_tx_info *c) 2313 { 2314 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 2315 return NULL; 2316 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 2317 } 2318 2319 static inline struct ieee80211_rate * 2320 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 2321 const struct ieee80211_tx_info *c) 2322 { 2323 if (c->control.rts_cts_rate_idx < 0) 2324 return NULL; 2325 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 2326 } 2327 2328 static inline struct ieee80211_rate * 2329 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 2330 const struct ieee80211_tx_info *c, int idx) 2331 { 2332 if (c->control.rates[idx + 1].idx < 0) 2333 return NULL; 2334 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 2335 } 2336 2337 /** 2338 * ieee80211_free_txskb - free TX skb 2339 * @hw: the hardware 2340 * @skb: the skb 2341 * 2342 * Free a transmit skb. Use this funtion when some failure 2343 * to transmit happened and thus status cannot be reported. 2344 */ 2345 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 2346 2347 /** 2348 * DOC: Hardware crypto acceleration 2349 * 2350 * mac80211 is capable of taking advantage of many hardware 2351 * acceleration designs for encryption and decryption operations. 2352 * 2353 * The set_key() callback in the &struct ieee80211_ops for a given 2354 * device is called to enable hardware acceleration of encryption and 2355 * decryption. The callback takes a @sta parameter that will be NULL 2356 * for default keys or keys used for transmission only, or point to 2357 * the station information for the peer for individual keys. 2358 * Multiple transmission keys with the same key index may be used when 2359 * VLANs are configured for an access point. 2360 * 2361 * When transmitting, the TX control data will use the @hw_key_idx 2362 * selected by the driver by modifying the &struct ieee80211_key_conf 2363 * pointed to by the @key parameter to the set_key() function. 2364 * 2365 * The set_key() call for the %SET_KEY command should return 0 if 2366 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 2367 * added; if you return 0 then hw_key_idx must be assigned to the 2368 * hardware key index, you are free to use the full u8 range. 2369 * 2370 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is 2371 * set, mac80211 will not automatically fall back to software crypto if 2372 * enabling hardware crypto failed. The set_key() call may also return the 2373 * value 1 to permit this specific key/algorithm to be done in software. 2374 * 2375 * When the cmd is %DISABLE_KEY then it must succeed. 2376 * 2377 * Note that it is permissible to not decrypt a frame even if a key 2378 * for it has been uploaded to hardware, the stack will not make any 2379 * decision based on whether a key has been uploaded or not but rather 2380 * based on the receive flags. 2381 * 2382 * The &struct ieee80211_key_conf structure pointed to by the @key 2383 * parameter is guaranteed to be valid until another call to set_key() 2384 * removes it, but it can only be used as a cookie to differentiate 2385 * keys. 2386 * 2387 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 2388 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 2389 * handler. 2390 * The update_tkip_key() call updates the driver with the new phase 1 key. 2391 * This happens every time the iv16 wraps around (every 65536 packets). The 2392 * set_key() call will happen only once for each key (unless the AP did 2393 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 2394 * provided by update_tkip_key only. The trigger that makes mac80211 call this 2395 * handler is software decryption with wrap around of iv16. 2396 * 2397 * The set_default_unicast_key() call updates the default WEP key index 2398 * configured to the hardware for WEP encryption type. This is required 2399 * for devices that support offload of data packets (e.g. ARP responses). 2400 */ 2401 2402 /** 2403 * DOC: Powersave support 2404 * 2405 * mac80211 has support for various powersave implementations. 2406 * 2407 * First, it can support hardware that handles all powersaving by itself, 2408 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 2409 * flag. In that case, it will be told about the desired powersave mode 2410 * with the %IEEE80211_CONF_PS flag depending on the association status. 2411 * The hardware must take care of sending nullfunc frames when necessary, 2412 * i.e. when entering and leaving powersave mode. The hardware is required 2413 * to look at the AID in beacons and signal to the AP that it woke up when 2414 * it finds traffic directed to it. 2415 * 2416 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 2417 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 2418 * with hardware wakeup and sleep states. Driver is responsible for waking 2419 * up the hardware before issuing commands to the hardware and putting it 2420 * back to sleep at appropriate times. 2421 * 2422 * When PS is enabled, hardware needs to wakeup for beacons and receive the 2423 * buffered multicast/broadcast frames after the beacon. Also it must be 2424 * possible to send frames and receive the acknowledment frame. 2425 * 2426 * Other hardware designs cannot send nullfunc frames by themselves and also 2427 * need software support for parsing the TIM bitmap. This is also supported 2428 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 2429 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 2430 * required to pass up beacons. The hardware is still required to handle 2431 * waking up for multicast traffic; if it cannot the driver must handle that 2432 * as best as it can, mac80211 is too slow to do that. 2433 * 2434 * Dynamic powersave is an extension to normal powersave in which the 2435 * hardware stays awake for a user-specified period of time after sending a 2436 * frame so that reply frames need not be buffered and therefore delayed to 2437 * the next wakeup. It's compromise of getting good enough latency when 2438 * there's data traffic and still saving significantly power in idle 2439 * periods. 2440 * 2441 * Dynamic powersave is simply supported by mac80211 enabling and disabling 2442 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 2443 * flag and mac80211 will handle everything automatically. Additionally, 2444 * hardware having support for the dynamic PS feature may set the 2445 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 2446 * dynamic PS mode itself. The driver needs to look at the 2447 * @dynamic_ps_timeout hardware configuration value and use it that value 2448 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 2449 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 2450 * enabled whenever user has enabled powersave. 2451 * 2452 * Driver informs U-APSD client support by enabling 2453 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the 2454 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 2455 * Nullfunc frames and stay awake until the service period has ended. To 2456 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 2457 * from that AC are transmitted with powersave enabled. 2458 * 2459 * Note: U-APSD client mode is not yet supported with 2460 * %IEEE80211_HW_PS_NULLFUNC_STACK. 2461 */ 2462 2463 /** 2464 * DOC: Beacon filter support 2465 * 2466 * Some hardware have beacon filter support to reduce host cpu wakeups 2467 * which will reduce system power consumption. It usually works so that 2468 * the firmware creates a checksum of the beacon but omits all constantly 2469 * changing elements (TSF, TIM etc). Whenever the checksum changes the 2470 * beacon is forwarded to the host, otherwise it will be just dropped. That 2471 * way the host will only receive beacons where some relevant information 2472 * (for example ERP protection or WMM settings) have changed. 2473 * 2474 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 2475 * interface capability. The driver needs to enable beacon filter support 2476 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 2477 * power save is enabled, the stack will not check for beacon loss and the 2478 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 2479 * 2480 * The time (or number of beacons missed) until the firmware notifies the 2481 * driver of a beacon loss event (which in turn causes the driver to call 2482 * ieee80211_beacon_loss()) should be configurable and will be controlled 2483 * by mac80211 and the roaming algorithm in the future. 2484 * 2485 * Since there may be constantly changing information elements that nothing 2486 * in the software stack cares about, we will, in the future, have mac80211 2487 * tell the driver which information elements are interesting in the sense 2488 * that we want to see changes in them. This will include 2489 * - a list of information element IDs 2490 * - a list of OUIs for the vendor information element 2491 * 2492 * Ideally, the hardware would filter out any beacons without changes in the 2493 * requested elements, but if it cannot support that it may, at the expense 2494 * of some efficiency, filter out only a subset. For example, if the device 2495 * doesn't support checking for OUIs it should pass up all changes in all 2496 * vendor information elements. 2497 * 2498 * Note that change, for the sake of simplification, also includes information 2499 * elements appearing or disappearing from the beacon. 2500 * 2501 * Some hardware supports an "ignore list" instead, just make sure nothing 2502 * that was requested is on the ignore list, and include commonly changing 2503 * information element IDs in the ignore list, for example 11 (BSS load) and 2504 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 2505 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 2506 * it could also include some currently unused IDs. 2507 * 2508 * 2509 * In addition to these capabilities, hardware should support notifying the 2510 * host of changes in the beacon RSSI. This is relevant to implement roaming 2511 * when no traffic is flowing (when traffic is flowing we see the RSSI of 2512 * the received data packets). This can consist in notifying the host when 2513 * the RSSI changes significantly or when it drops below or rises above 2514 * configurable thresholds. In the future these thresholds will also be 2515 * configured by mac80211 (which gets them from userspace) to implement 2516 * them as the roaming algorithm requires. 2517 * 2518 * If the hardware cannot implement this, the driver should ask it to 2519 * periodically pass beacon frames to the host so that software can do the 2520 * signal strength threshold checking. 2521 */ 2522 2523 /** 2524 * DOC: Spatial multiplexing power save 2525 * 2526 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 2527 * power in an 802.11n implementation. For details on the mechanism 2528 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 2529 * "11.2.3 SM power save". 2530 * 2531 * The mac80211 implementation is capable of sending action frames 2532 * to update the AP about the station's SMPS mode, and will instruct 2533 * the driver to enter the specific mode. It will also announce the 2534 * requested SMPS mode during the association handshake. Hardware 2535 * support for this feature is required, and can be indicated by 2536 * hardware flags. 2537 * 2538 * The default mode will be "automatic", which nl80211/cfg80211 2539 * defines to be dynamic SMPS in (regular) powersave, and SMPS 2540 * turned off otherwise. 2541 * 2542 * To support this feature, the driver must set the appropriate 2543 * hardware support flags, and handle the SMPS flag to the config() 2544 * operation. It will then with this mechanism be instructed to 2545 * enter the requested SMPS mode while associated to an HT AP. 2546 */ 2547 2548 /** 2549 * DOC: Frame filtering 2550 * 2551 * mac80211 requires to see many management frames for proper 2552 * operation, and users may want to see many more frames when 2553 * in monitor mode. However, for best CPU usage and power consumption, 2554 * having as few frames as possible percolate through the stack is 2555 * desirable. Hence, the hardware should filter as much as possible. 2556 * 2557 * To achieve this, mac80211 uses filter flags (see below) to tell 2558 * the driver's configure_filter() function which frames should be 2559 * passed to mac80211 and which should be filtered out. 2560 * 2561 * Before configure_filter() is invoked, the prepare_multicast() 2562 * callback is invoked with the parameters @mc_count and @mc_list 2563 * for the combined multicast address list of all virtual interfaces. 2564 * It's use is optional, and it returns a u64 that is passed to 2565 * configure_filter(). Additionally, configure_filter() has the 2566 * arguments @changed_flags telling which flags were changed and 2567 * @total_flags with the new flag states. 2568 * 2569 * If your device has no multicast address filters your driver will 2570 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2571 * parameter to see whether multicast frames should be accepted 2572 * or dropped. 2573 * 2574 * All unsupported flags in @total_flags must be cleared. 2575 * Hardware does not support a flag if it is incapable of _passing_ 2576 * the frame to the stack. Otherwise the driver must ignore 2577 * the flag, but not clear it. 2578 * You must _only_ clear the flag (announce no support for the 2579 * flag to mac80211) if you are not able to pass the packet type 2580 * to the stack (so the hardware always filters it). 2581 * So for example, you should clear @FIF_CONTROL, if your hardware 2582 * always filters control frames. If your hardware always passes 2583 * control frames to the kernel and is incapable of filtering them, 2584 * you do _not_ clear the @FIF_CONTROL flag. 2585 * This rule applies to all other FIF flags as well. 2586 */ 2587 2588 /** 2589 * DOC: AP support for powersaving clients 2590 * 2591 * In order to implement AP and P2P GO modes, mac80211 has support for 2592 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2593 * There currently is no support for sAPSD. 2594 * 2595 * There is one assumption that mac80211 makes, namely that a client 2596 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2597 * Both are supported, and both can be used by the same client, but 2598 * they can't be used concurrently by the same client. This simplifies 2599 * the driver code. 2600 * 2601 * The first thing to keep in mind is that there is a flag for complete 2602 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2603 * mac80211 expects the driver to handle most of the state machine for 2604 * powersaving clients and will ignore the PM bit in incoming frames. 2605 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2606 * stations' powersave transitions. In this mode, mac80211 also doesn't 2607 * handle PS-Poll/uAPSD. 2608 * 2609 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2610 * PM bit in incoming frames for client powersave transitions. When a 2611 * station goes to sleep, we will stop transmitting to it. There is, 2612 * however, a race condition: a station might go to sleep while there is 2613 * data buffered on hardware queues. If the device has support for this 2614 * it will reject frames, and the driver should give the frames back to 2615 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2616 * cause mac80211 to retry the frame when the station wakes up. The 2617 * driver is also notified of powersave transitions by calling its 2618 * @sta_notify callback. 2619 * 2620 * When the station is asleep, it has three choices: it can wake up, 2621 * it can PS-Poll, or it can possibly start a uAPSD service period. 2622 * Waking up is implemented by simply transmitting all buffered (and 2623 * filtered) frames to the station. This is the easiest case. When 2624 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2625 * will inform the driver of this with the @allow_buffered_frames 2626 * callback; this callback is optional. mac80211 will then transmit 2627 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2628 * on each frame. The last frame in the service period (or the only 2629 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2630 * indicate that it ends the service period; as this frame must have 2631 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2632 * When TX status is reported for this frame, the service period is 2633 * marked has having ended and a new one can be started by the peer. 2634 * 2635 * Additionally, non-bufferable MMPDUs can also be transmitted by 2636 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2637 * 2638 * Another race condition can happen on some devices like iwlwifi 2639 * when there are frames queued for the station and it wakes up 2640 * or polls; the frames that are already queued could end up being 2641 * transmitted first instead, causing reordering and/or wrong 2642 * processing of the EOSP. The cause is that allowing frames to be 2643 * transmitted to a certain station is out-of-band communication to 2644 * the device. To allow this problem to be solved, the driver can 2645 * call ieee80211_sta_block_awake() if frames are buffered when it 2646 * is notified that the station went to sleep. When all these frames 2647 * have been filtered (see above), it must call the function again 2648 * to indicate that the station is no longer blocked. 2649 * 2650 * If the driver buffers frames in the driver for aggregation in any 2651 * way, it must use the ieee80211_sta_set_buffered() call when it is 2652 * notified of the station going to sleep to inform mac80211 of any 2653 * TIDs that have frames buffered. Note that when a station wakes up 2654 * this information is reset (hence the requirement to call it when 2655 * informed of the station going to sleep). Then, when a service 2656 * period starts for any reason, @release_buffered_frames is called 2657 * with the number of frames to be released and which TIDs they are 2658 * to come from. In this case, the driver is responsible for setting 2659 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2660 * to help the @more_data parameter is passed to tell the driver if 2661 * there is more data on other TIDs -- the TIDs to release frames 2662 * from are ignored since mac80211 doesn't know how many frames the 2663 * buffers for those TIDs contain. 2664 * 2665 * If the driver also implement GO mode, where absence periods may 2666 * shorten service periods (or abort PS-Poll responses), it must 2667 * filter those response frames except in the case of frames that 2668 * are buffered in the driver -- those must remain buffered to avoid 2669 * reordering. Because it is possible that no frames are released 2670 * in this case, the driver must call ieee80211_sta_eosp() 2671 * to indicate to mac80211 that the service period ended anyway. 2672 * 2673 * Finally, if frames from multiple TIDs are released from mac80211 2674 * but the driver might reorder them, it must clear & set the flags 2675 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2676 * and also take care of the EOSP and MORE_DATA bits in the frame. 2677 * The driver may also use ieee80211_sta_eosp() in this case. 2678 * 2679 * Note that if the driver ever buffers frames other than QoS-data 2680 * frames, it must take care to never send a non-QoS-data frame as 2681 * the last frame in a service period, adding a QoS-nulldata frame 2682 * after a non-QoS-data frame if needed. 2683 */ 2684 2685 /** 2686 * DOC: HW queue control 2687 * 2688 * Before HW queue control was introduced, mac80211 only had a single static 2689 * assignment of per-interface AC software queues to hardware queues. This 2690 * was problematic for a few reasons: 2691 * 1) off-channel transmissions might get stuck behind other frames 2692 * 2) multiple virtual interfaces couldn't be handled correctly 2693 * 3) after-DTIM frames could get stuck behind other frames 2694 * 2695 * To solve this, hardware typically uses multiple different queues for all 2696 * the different usages, and this needs to be propagated into mac80211 so it 2697 * won't have the same problem with the software queues. 2698 * 2699 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2700 * flag that tells it that the driver implements its own queue control. To do 2701 * so, the driver will set up the various queues in each &struct ieee80211_vif 2702 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2703 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2704 * if necessary will queue the frame on the right software queue that mirrors 2705 * the hardware queue. 2706 * Additionally, the driver has to then use these HW queue IDs for the queue 2707 * management functions (ieee80211_stop_queue() et al.) 2708 * 2709 * The driver is free to set up the queue mappings as needed, multiple virtual 2710 * interfaces may map to the same hardware queues if needed. The setup has to 2711 * happen during add_interface or change_interface callbacks. For example, a 2712 * driver supporting station+station and station+AP modes might decide to have 2713 * 10 hardware queues to handle different scenarios: 2714 * 2715 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2716 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2717 * after-DTIM queue for AP: 8 2718 * off-channel queue: 9 2719 * 2720 * It would then set up the hardware like this: 2721 * hw.offchannel_tx_hw_queue = 9 2722 * 2723 * and the first virtual interface that is added as follows: 2724 * vif.hw_queue[IEEE80211_AC_VO] = 0 2725 * vif.hw_queue[IEEE80211_AC_VI] = 1 2726 * vif.hw_queue[IEEE80211_AC_BE] = 2 2727 * vif.hw_queue[IEEE80211_AC_BK] = 3 2728 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2729 * and the second virtual interface with 4-7. 2730 * 2731 * If queue 6 gets full, for example, mac80211 would only stop the second 2732 * virtual interface's BE queue since virtual interface queues are per AC. 2733 * 2734 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2735 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2736 * queue could potentially be shared since mac80211 will look at cab_queue when 2737 * a queue is stopped/woken even if the interface is not in AP mode. 2738 */ 2739 2740 /** 2741 * enum ieee80211_filter_flags - hardware filter flags 2742 * 2743 * These flags determine what the filter in hardware should be 2744 * programmed to let through and what should not be passed to the 2745 * stack. It is always safe to pass more frames than requested, 2746 * but this has negative impact on power consumption. 2747 * 2748 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2749 * by the user or if the hardware is not capable of filtering by 2750 * multicast address. 2751 * 2752 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2753 * %RX_FLAG_FAILED_FCS_CRC for them) 2754 * 2755 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2756 * the %RX_FLAG_FAILED_PLCP_CRC for them 2757 * 2758 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2759 * to the hardware that it should not filter beacons or probe responses 2760 * by BSSID. Filtering them can greatly reduce the amount of processing 2761 * mac80211 needs to do and the amount of CPU wakeups, so you should 2762 * honour this flag if possible. 2763 * 2764 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this 2765 * station 2766 * 2767 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2768 * 2769 * @FIF_PSPOLL: pass PS Poll frames 2770 * 2771 * @FIF_PROBE_REQ: pass probe request frames 2772 */ 2773 enum ieee80211_filter_flags { 2774 FIF_ALLMULTI = 1<<1, 2775 FIF_FCSFAIL = 1<<2, 2776 FIF_PLCPFAIL = 1<<3, 2777 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2778 FIF_CONTROL = 1<<5, 2779 FIF_OTHER_BSS = 1<<6, 2780 FIF_PSPOLL = 1<<7, 2781 FIF_PROBE_REQ = 1<<8, 2782 }; 2783 2784 /** 2785 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2786 * 2787 * These flags are used with the ampdu_action() callback in 2788 * &struct ieee80211_ops to indicate which action is needed. 2789 * 2790 * Note that drivers MUST be able to deal with a TX aggregation 2791 * session being stopped even before they OK'ed starting it by 2792 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2793 * might receive the addBA frame and send a delBA right away! 2794 * 2795 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2796 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2797 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2798 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2799 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2800 * queued packets, now unaggregated. After all packets are transmitted the 2801 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2802 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2803 * called when the station is removed. There's no need or reason to call 2804 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2805 * session is gone and removes the station. 2806 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2807 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2808 * now the connection is dropped and the station will be removed. Drivers 2809 * should clean up and drop remaining packets when this is called. 2810 */ 2811 enum ieee80211_ampdu_mlme_action { 2812 IEEE80211_AMPDU_RX_START, 2813 IEEE80211_AMPDU_RX_STOP, 2814 IEEE80211_AMPDU_TX_START, 2815 IEEE80211_AMPDU_TX_STOP_CONT, 2816 IEEE80211_AMPDU_TX_STOP_FLUSH, 2817 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2818 IEEE80211_AMPDU_TX_OPERATIONAL, 2819 }; 2820 2821 /** 2822 * struct ieee80211_ampdu_params - AMPDU action parameters 2823 * 2824 * @action: the ampdu action, value from %ieee80211_ampdu_mlme_action. 2825 * @sta: peer of this AMPDU session 2826 * @tid: tid of the BA session 2827 * @ssn: start sequence number of the session. TX/RX_STOP can pass 0. When 2828 * action is set to %IEEE80211_AMPDU_RX_START the driver passes back the 2829 * actual ssn value used to start the session and writes the value here. 2830 * @buf_size: reorder buffer size (number of subframes). Valid only when the 2831 * action is set to %IEEE80211_AMPDU_RX_START or 2832 * %IEEE80211_AMPDU_TX_OPERATIONAL 2833 * @amsdu: indicates the peer's ability to receive A-MSDU within A-MPDU. 2834 * valid when the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL 2835 * @timeout: BA session timeout. Valid only when the action is set to 2836 * %IEEE80211_AMPDU_RX_START 2837 */ 2838 struct ieee80211_ampdu_params { 2839 enum ieee80211_ampdu_mlme_action action; 2840 struct ieee80211_sta *sta; 2841 u16 tid; 2842 u16 ssn; 2843 u8 buf_size; 2844 bool amsdu; 2845 u16 timeout; 2846 }; 2847 2848 /** 2849 * enum ieee80211_frame_release_type - frame release reason 2850 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2851 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2852 * frame received on trigger-enabled AC 2853 */ 2854 enum ieee80211_frame_release_type { 2855 IEEE80211_FRAME_RELEASE_PSPOLL, 2856 IEEE80211_FRAME_RELEASE_UAPSD, 2857 }; 2858 2859 /** 2860 * enum ieee80211_rate_control_changed - flags to indicate what changed 2861 * 2862 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2863 * to this station changed. The actual bandwidth is in the station 2864 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2865 * flag changes, for HT and VHT the bandwidth field changes. 2866 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2867 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2868 * changed (in IBSS mode) due to discovering more information about 2869 * the peer. 2870 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2871 * by the peer 2872 */ 2873 enum ieee80211_rate_control_changed { 2874 IEEE80211_RC_BW_CHANGED = BIT(0), 2875 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2876 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2877 IEEE80211_RC_NSS_CHANGED = BIT(3), 2878 }; 2879 2880 /** 2881 * enum ieee80211_roc_type - remain on channel type 2882 * 2883 * With the support for multi channel contexts and multi channel operations, 2884 * remain on channel operations might be limited/deferred/aborted by other 2885 * flows/operations which have higher priority (and vise versa). 2886 * Specifying the ROC type can be used by devices to prioritize the ROC 2887 * operations compared to other operations/flows. 2888 * 2889 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2890 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2891 * for sending managment frames offchannel. 2892 */ 2893 enum ieee80211_roc_type { 2894 IEEE80211_ROC_TYPE_NORMAL = 0, 2895 IEEE80211_ROC_TYPE_MGMT_TX, 2896 }; 2897 2898 /** 2899 * enum ieee80211_reconfig_complete_type - reconfig type 2900 * 2901 * This enum is used by the reconfig_complete() callback to indicate what 2902 * reconfiguration type was completed. 2903 * 2904 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type 2905 * (also due to resume() callback returning 1) 2906 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless 2907 * of wowlan configuration) 2908 */ 2909 enum ieee80211_reconfig_type { 2910 IEEE80211_RECONFIG_TYPE_RESTART, 2911 IEEE80211_RECONFIG_TYPE_SUSPEND, 2912 }; 2913 2914 /** 2915 * struct ieee80211_ops - callbacks from mac80211 to the driver 2916 * 2917 * This structure contains various callbacks that the driver may 2918 * handle or, in some cases, must handle, for example to configure 2919 * the hardware to a new channel or to transmit a frame. 2920 * 2921 * @tx: Handler that 802.11 module calls for each transmitted frame. 2922 * skb contains the buffer starting from the IEEE 802.11 header. 2923 * The low-level driver should send the frame out based on 2924 * configuration in the TX control data. This handler should, 2925 * preferably, never fail and stop queues appropriately. 2926 * Must be atomic. 2927 * 2928 * @start: Called before the first netdevice attached to the hardware 2929 * is enabled. This should turn on the hardware and must turn on 2930 * frame reception (for possibly enabled monitor interfaces.) 2931 * Returns negative error codes, these may be seen in userspace, 2932 * or zero. 2933 * When the device is started it should not have a MAC address 2934 * to avoid acknowledging frames before a non-monitor device 2935 * is added. 2936 * Must be implemented and can sleep. 2937 * 2938 * @stop: Called after last netdevice attached to the hardware 2939 * is disabled. This should turn off the hardware (at least 2940 * it must turn off frame reception.) 2941 * May be called right after add_interface if that rejects 2942 * an interface. If you added any work onto the mac80211 workqueue 2943 * you should ensure to cancel it on this callback. 2944 * Must be implemented and can sleep. 2945 * 2946 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2947 * stop transmitting and doing any other configuration, and then 2948 * ask the device to suspend. This is only invoked when WoWLAN is 2949 * configured, otherwise the device is deconfigured completely and 2950 * reconfigured at resume time. 2951 * The driver may also impose special conditions under which it 2952 * wants to use the "normal" suspend (deconfigure), say if it only 2953 * supports WoWLAN when the device is associated. In this case, it 2954 * must return 1 from this function. 2955 * 2956 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2957 * now resuming its operation, after this the device must be fully 2958 * functional again. If this returns an error, the only way out is 2959 * to also unregister the device. If it returns 1, then mac80211 2960 * will also go through the regular complete restart on resume. 2961 * 2962 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2963 * modified. The reason is that device_set_wakeup_enable() is 2964 * supposed to be called when the configuration changes, not only 2965 * in suspend(). 2966 * 2967 * @add_interface: Called when a netdevice attached to the hardware is 2968 * enabled. Because it is not called for monitor mode devices, @start 2969 * and @stop must be implemented. 2970 * The driver should perform any initialization it needs before 2971 * the device can be enabled. The initial configuration for the 2972 * interface is given in the conf parameter. 2973 * The callback may refuse to add an interface by returning a 2974 * negative error code (which will be seen in userspace.) 2975 * Must be implemented and can sleep. 2976 * 2977 * @change_interface: Called when a netdevice changes type. This callback 2978 * is optional, but only if it is supported can interface types be 2979 * switched while the interface is UP. The callback may sleep. 2980 * Note that while an interface is being switched, it will not be 2981 * found by the interface iteration callbacks. 2982 * 2983 * @remove_interface: Notifies a driver that an interface is going down. 2984 * The @stop callback is called after this if it is the last interface 2985 * and no monitor interfaces are present. 2986 * When all interfaces are removed, the MAC address in the hardware 2987 * must be cleared so the device no longer acknowledges packets, 2988 * the mac_addr member of the conf structure is, however, set to the 2989 * MAC address of the device going away. 2990 * Hence, this callback must be implemented. It can sleep. 2991 * 2992 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2993 * function to change hardware configuration, e.g., channel. 2994 * This function should never fail but returns a negative error code 2995 * if it does. The callback can sleep. 2996 * 2997 * @bss_info_changed: Handler for configuration requests related to BSS 2998 * parameters that may vary during BSS's lifespan, and may affect low 2999 * level driver (e.g. assoc/disassoc status, erp parameters). 3000 * This function should not be used if no BSS has been set, unless 3001 * for association indication. The @changed parameter indicates which 3002 * of the bss parameters has changed when a call is made. The callback 3003 * can sleep. 3004 * 3005 * @prepare_multicast: Prepare for multicast filter configuration. 3006 * This callback is optional, and its return value is passed 3007 * to configure_filter(). This callback must be atomic. 3008 * 3009 * @configure_filter: Configure the device's RX filter. 3010 * See the section "Frame filtering" for more information. 3011 * This callback must be implemented and can sleep. 3012 * 3013 * @config_iface_filter: Configure the interface's RX filter. 3014 * This callback is optional and is used to configure which frames 3015 * should be passed to mac80211. The filter_flags is the combination 3016 * of FIF_* flags. The changed_flags is a bit mask that indicates 3017 * which flags are changed. 3018 * This callback can sleep. 3019 * 3020 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 3021 * must be set or cleared for a given STA. Must be atomic. 3022 * 3023 * @set_key: See the section "Hardware crypto acceleration" 3024 * This callback is only called between add_interface and 3025 * remove_interface calls, i.e. while the given virtual interface 3026 * is enabled. 3027 * Returns a negative error code if the key can't be added. 3028 * The callback can sleep. 3029 * 3030 * @update_tkip_key: See the section "Hardware crypto acceleration" 3031 * This callback will be called in the context of Rx. Called for drivers 3032 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 3033 * The callback must be atomic. 3034 * 3035 * @set_rekey_data: If the device supports GTK rekeying, for example while the 3036 * host is suspended, it can assign this callback to retrieve the data 3037 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 3038 * After rekeying was done it should (for example during resume) notify 3039 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 3040 * 3041 * @set_default_unicast_key: Set the default (unicast) key index, useful for 3042 * WEP when the device sends data packets autonomously, e.g. for ARP 3043 * offloading. The index can be 0-3, or -1 for unsetting it. 3044 * 3045 * @hw_scan: Ask the hardware to service the scan request, no need to start 3046 * the scan state machine in stack. The scan must honour the channel 3047 * configuration done by the regulatory agent in the wiphy's 3048 * registered bands. The hardware (or the driver) needs to make sure 3049 * that power save is disabled. 3050 * The @req ie/ie_len members are rewritten by mac80211 to contain the 3051 * entire IEs after the SSID, so that drivers need not look at these 3052 * at all but just send them after the SSID -- mac80211 includes the 3053 * (extended) supported rates and HT information (where applicable). 3054 * When the scan finishes, ieee80211_scan_completed() must be called; 3055 * note that it also must be called when the scan cannot finish due to 3056 * any error unless this callback returned a negative error code. 3057 * The callback can sleep. 3058 * 3059 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 3060 * The driver should ask the hardware to cancel the scan (if possible), 3061 * but the scan will be completed only after the driver will call 3062 * ieee80211_scan_completed(). 3063 * This callback is needed for wowlan, to prevent enqueueing a new 3064 * scan_work after the low-level driver was already suspended. 3065 * The callback can sleep. 3066 * 3067 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 3068 * specific intervals. The driver must call the 3069 * ieee80211_sched_scan_results() function whenever it finds results. 3070 * This process will continue until sched_scan_stop is called. 3071 * 3072 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 3073 * In this case, ieee80211_sched_scan_stopped() must not be called. 3074 * 3075 * @sw_scan_start: Notifier function that is called just before a software scan 3076 * is started. Can be NULL, if the driver doesn't need this notification. 3077 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR, 3078 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it 3079 * can use this parameter. The callback can sleep. 3080 * 3081 * @sw_scan_complete: Notifier function that is called just after a 3082 * software scan finished. Can be NULL, if the driver doesn't need 3083 * this notification. 3084 * The callback can sleep. 3085 * 3086 * @get_stats: Return low-level statistics. 3087 * Returns zero if statistics are available. 3088 * The callback can sleep. 3089 * 3090 * @get_key_seq: If your device implements encryption in hardware and does 3091 * IV/PN assignment then this callback should be provided to read the 3092 * IV/PN for the given key from hardware. 3093 * The callback must be atomic. 3094 * 3095 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 3096 * if the device does fragmentation by itself; if this callback is 3097 * implemented then the stack will not do fragmentation. 3098 * The callback can sleep. 3099 * 3100 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 3101 * The callback can sleep. 3102 * 3103 * @sta_add: Notifies low level driver about addition of an associated station, 3104 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 3105 * 3106 * @sta_remove: Notifies low level driver about removal of an associated 3107 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 3108 * returns it isn't safe to use the pointer, not even RCU protected; 3109 * no RCU grace period is guaranteed between returning here and freeing 3110 * the station. See @sta_pre_rcu_remove if needed. 3111 * This callback can sleep. 3112 * 3113 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 3114 * when a station is added to mac80211's station list. This callback 3115 * should be within a CONFIG_MAC80211_DEBUGFS conditional. This 3116 * callback can sleep. 3117 * 3118 * @sta_notify: Notifies low level driver about power state transition of an 3119 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 3120 * in AP mode, this callback will not be called when the flag 3121 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 3122 * 3123 * @sta_state: Notifies low level driver about state transition of a 3124 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 3125 * This callback is mutually exclusive with @sta_add/@sta_remove. 3126 * It must not fail for down transitions but may fail for transitions 3127 * up the list of states. Also note that after the callback returns it 3128 * isn't safe to use the pointer, not even RCU protected - no RCU grace 3129 * period is guaranteed between returning here and freeing the station. 3130 * See @sta_pre_rcu_remove if needed. 3131 * The callback can sleep. 3132 * 3133 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 3134 * synchronisation. This is useful if a driver needs to have station 3135 * pointers protected using RCU, it can then use this call to clear 3136 * the pointers instead of waiting for an RCU grace period to elapse 3137 * in @sta_state. 3138 * The callback can sleep. 3139 * 3140 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 3141 * used to transmit to the station. The changes are advertised with bits 3142 * from &enum ieee80211_rate_control_changed and the values are reflected 3143 * in the station data. This callback should only be used when the driver 3144 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 3145 * otherwise the rate control algorithm is notified directly. 3146 * Must be atomic. 3147 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This 3148 * is only used if the configured rate control algorithm actually uses 3149 * the new rate table API, and is therefore optional. Must be atomic. 3150 * 3151 * @sta_statistics: Get statistics for this station. For example with beacon 3152 * filtering, the statistics kept by mac80211 might not be accurate, so 3153 * let the driver pre-fill the statistics. The driver can fill most of 3154 * the values (indicating which by setting the filled bitmap), but not 3155 * all of them make sense - see the source for which ones are possible. 3156 * Statistics that the driver doesn't fill will be filled by mac80211. 3157 * The callback can sleep. 3158 * 3159 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 3160 * bursting) for a hardware TX queue. 3161 * Returns a negative error code on failure. 3162 * The callback can sleep. 3163 * 3164 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 3165 * this is only used for IBSS mode BSSID merging and debugging. Is not a 3166 * required function. 3167 * The callback can sleep. 3168 * 3169 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 3170 * Currently, this is only used for IBSS mode debugging. Is not a 3171 * required function. 3172 * The callback can sleep. 3173 * 3174 * @offset_tsf: Offset the TSF timer by the specified value in the 3175 * firmware/hardware. Preferred to set_tsf as it avoids delay between 3176 * calling set_tsf() and hardware getting programmed, which will show up 3177 * as TSF delay. Is not a required function. 3178 * The callback can sleep. 3179 * 3180 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 3181 * with other STAs in the IBSS. This is only used in IBSS mode. This 3182 * function is optional if the firmware/hardware takes full care of 3183 * TSF synchronization. 3184 * The callback can sleep. 3185 * 3186 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 3187 * This is needed only for IBSS mode and the result of this function is 3188 * used to determine whether to reply to Probe Requests. 3189 * Returns non-zero if this device sent the last beacon. 3190 * The callback can sleep. 3191 * 3192 * @ampdu_action: Perform a certain A-MPDU action 3193 * The RA/TID combination determines the destination and TID we want 3194 * the ampdu action to be performed for. The action is defined through 3195 * ieee80211_ampdu_mlme_action. 3196 * When the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL the driver 3197 * may neither send aggregates containing more subframes than @buf_size 3198 * nor send aggregates in a way that lost frames would exceed the 3199 * buffer size. If just limiting the aggregate size, this would be 3200 * possible with a buf_size of 8: 3201 * - TX: 1.....7 3202 * - RX: 2....7 (lost frame #1) 3203 * - TX: 8..1... 3204 * which is invalid since #1 was now re-transmitted well past the 3205 * buffer size of 8. Correct ways to retransmit #1 would be: 3206 * - TX: 1 or 18 or 81 3207 * Even "189" would be wrong since 1 could be lost again. 3208 * 3209 * Returns a negative error code on failure. 3210 * The callback can sleep. 3211 * 3212 * @get_survey: Return per-channel survey information 3213 * 3214 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 3215 * need to set wiphy->rfkill_poll to %true before registration, 3216 * and need to call wiphy_rfkill_set_hw_state() in the callback. 3217 * The callback can sleep. 3218 * 3219 * @set_coverage_class: Set slot time for given coverage class as specified 3220 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 3221 * accordingly; coverage class equals to -1 to enable ACK timeout 3222 * estimation algorithm (dynack). To disable dynack set valid value for 3223 * coverage class. This callback is not required and may sleep. 3224 * 3225 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 3226 * be %NULL. The callback can sleep. 3227 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 3228 * 3229 * @flush: Flush all pending frames from the hardware queue, making sure 3230 * that the hardware queues are empty. The @queues parameter is a bitmap 3231 * of queues to flush, which is useful if different virtual interfaces 3232 * use different hardware queues; it may also indicate all queues. 3233 * If the parameter @drop is set to %true, pending frames may be dropped. 3234 * Note that vif can be NULL. 3235 * The callback can sleep. 3236 * 3237 * @channel_switch: Drivers that need (or want) to offload the channel 3238 * switch operation for CSAs received from the AP may implement this 3239 * callback. They must then call ieee80211_chswitch_done() to indicate 3240 * completion of the channel switch. 3241 * 3242 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 3243 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 3244 * reject TX/RX mask combinations they cannot support by returning -EINVAL 3245 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 3246 * 3247 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 3248 * 3249 * @remain_on_channel: Starts an off-channel period on the given channel, must 3250 * call back to ieee80211_ready_on_channel() when on that channel. Note 3251 * that normal channel traffic is not stopped as this is intended for hw 3252 * offload. Frames to transmit on the off-channel channel are transmitted 3253 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 3254 * duration (which will always be non-zero) expires, the driver must call 3255 * ieee80211_remain_on_channel_expired(). 3256 * Note that this callback may be called while the device is in IDLE and 3257 * must be accepted in this case. 3258 * This callback may sleep. 3259 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 3260 * aborted before it expires. This callback may sleep. 3261 * 3262 * @set_ringparam: Set tx and rx ring sizes. 3263 * 3264 * @get_ringparam: Get tx and rx ring current and maximum sizes. 3265 * 3266 * @tx_frames_pending: Check if there is any pending frame in the hardware 3267 * queues before entering power save. 3268 * 3269 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 3270 * when transmitting a frame. Currently only legacy rates are handled. 3271 * The callback can sleep. 3272 * @event_callback: Notify driver about any event in mac80211. See 3273 * &enum ieee80211_event_type for the different types. 3274 * The callback must be atomic. 3275 * 3276 * @release_buffered_frames: Release buffered frames according to the given 3277 * parameters. In the case where the driver buffers some frames for 3278 * sleeping stations mac80211 will use this callback to tell the driver 3279 * to release some frames, either for PS-poll or uAPSD. 3280 * Note that if the @more_data parameter is %false the driver must check 3281 * if there are more frames on the given TIDs, and if there are more than 3282 * the frames being released then it must still set the more-data bit in 3283 * the frame. If the @more_data parameter is %true, then of course the 3284 * more-data bit must always be set. 3285 * The @tids parameter tells the driver which TIDs to release frames 3286 * from, for PS-poll it will always have only a single bit set. 3287 * In the case this is used for a PS-poll initiated release, the 3288 * @num_frames parameter will always be 1 so code can be shared. In 3289 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 3290 * on the TX status (and must report TX status) so that the PS-poll 3291 * period is properly ended. This is used to avoid sending multiple 3292 * responses for a retried PS-poll frame. 3293 * In the case this is used for uAPSD, the @num_frames parameter may be 3294 * bigger than one, but the driver may send fewer frames (it must send 3295 * at least one, however). In this case it is also responsible for 3296 * setting the EOSP flag in the QoS header of the frames. Also, when the 3297 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 3298 * on the last frame in the SP. Alternatively, it may call the function 3299 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 3300 * This callback must be atomic. 3301 * @allow_buffered_frames: Prepare device to allow the given number of frames 3302 * to go out to the given station. The frames will be sent by mac80211 3303 * via the usual TX path after this call. The TX information for frames 3304 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 3305 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 3306 * frames from multiple TIDs are released and the driver might reorder 3307 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 3308 * on the last frame and clear it on all others and also handle the EOSP 3309 * bit in the QoS header correctly. Alternatively, it can also call the 3310 * ieee80211_sta_eosp() function. 3311 * The @tids parameter is a bitmap and tells the driver which TIDs the 3312 * frames will be on; it will at most have two bits set. 3313 * This callback must be atomic. 3314 * 3315 * @get_et_sset_count: Ethtool API to get string-set count. 3316 * 3317 * @get_et_stats: Ethtool API to get a set of u64 stats. 3318 * 3319 * @get_et_strings: Ethtool API to get a set of strings to describe stats 3320 * and perhaps other supported types of ethtool data-sets. 3321 * 3322 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 3323 * before associated. In multi-channel scenarios, a virtual interface is 3324 * bound to a channel before it is associated, but as it isn't associated 3325 * yet it need not necessarily be given airtime, in particular since any 3326 * transmission to a P2P GO needs to be synchronized against the GO's 3327 * powersave state. mac80211 will call this function before transmitting a 3328 * management frame prior to having successfully associated to allow the 3329 * driver to give it channel time for the transmission, to get a response 3330 * and to be able to synchronize with the GO. 3331 * The callback will be called before each transmission and upon return 3332 * mac80211 will transmit the frame right away. 3333 * The callback is optional and can (should!) sleep. 3334 * 3335 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending 3336 * a TDLS discovery-request, we expect a reply to arrive on the AP's 3337 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS 3338 * setup-response is a direct packet not buffered by the AP. 3339 * mac80211 will call this function just before the transmission of a TDLS 3340 * discovery-request. The recommended period of protection is at least 3341 * 2 * (DTIM period). 3342 * The callback is optional and can sleep. 3343 * 3344 * @add_chanctx: Notifies device driver about new channel context creation. 3345 * This callback may sleep. 3346 * @remove_chanctx: Notifies device driver about channel context destruction. 3347 * This callback may sleep. 3348 * @change_chanctx: Notifies device driver about channel context changes that 3349 * may happen when combining different virtual interfaces on the same 3350 * channel context with different settings 3351 * This callback may sleep. 3352 * @assign_vif_chanctx: Notifies device driver about channel context being bound 3353 * to vif. Possible use is for hw queue remapping. 3354 * This callback may sleep. 3355 * @unassign_vif_chanctx: Notifies device driver about channel context being 3356 * unbound from vif. 3357 * This callback may sleep. 3358 * @switch_vif_chanctx: switch a number of vifs from one chanctx to 3359 * another, as specified in the list of 3360 * @ieee80211_vif_chanctx_switch passed to the driver, according 3361 * to the mode defined in &ieee80211_chanctx_switch_mode. 3362 * This callback may sleep. 3363 * 3364 * @start_ap: Start operation on the AP interface, this is called after all the 3365 * information in bss_conf is set and beacon can be retrieved. A channel 3366 * context is bound before this is called. Note that if the driver uses 3367 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 3368 * just "paused" for scanning/ROC, which is indicated by the beacon being 3369 * disabled/enabled via @bss_info_changed. 3370 * @stop_ap: Stop operation on the AP interface. 3371 * 3372 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and 3373 * during resume, when the reconfiguration has completed. 3374 * This can help the driver implement the reconfiguration step (and 3375 * indicate mac80211 is ready to receive frames). 3376 * This callback may sleep. 3377 * 3378 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 3379 * Currently, this is only called for managed or P2P client interfaces. 3380 * This callback is optional; it must not sleep. 3381 * 3382 * @channel_switch_beacon: Starts a channel switch to a new channel. 3383 * Beacons are modified to include CSA or ECSA IEs before calling this 3384 * function. The corresponding count fields in these IEs must be 3385 * decremented, and when they reach 1 the driver must call 3386 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 3387 * get the csa counter decremented by mac80211, but must check if it is 3388 * 1 using ieee80211_csa_is_complete() after the beacon has been 3389 * transmitted and then call ieee80211_csa_finish(). 3390 * If the CSA count starts as zero or 1, this function will not be called, 3391 * since there won't be any time to beacon before the switch anyway. 3392 * @pre_channel_switch: This is an optional callback that is called 3393 * before a channel switch procedure is started (ie. when a STA 3394 * gets a CSA or an userspace initiated channel-switch), allowing 3395 * the driver to prepare for the channel switch. 3396 * @post_channel_switch: This is an optional callback that is called 3397 * after a channel switch procedure is completed, allowing the 3398 * driver to go back to a normal configuration. 3399 * 3400 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 3401 * information in bss_conf is set up and the beacon can be retrieved. A 3402 * channel context is bound before this is called. 3403 * @leave_ibss: Leave the IBSS again. 3404 * 3405 * @get_expected_throughput: extract the expected throughput towards the 3406 * specified station. The returned value is expressed in Kbps. It returns 0 3407 * if the RC algorithm does not have proper data to provide. 3408 * 3409 * @get_txpower: get current maximum tx power (in dBm) based on configuration 3410 * and hardware limits. 3411 * 3412 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver 3413 * is responsible for continually initiating channel-switching operations 3414 * and returning to the base channel for communication with the AP. The 3415 * driver receives a channel-switch request template and the location of 3416 * the switch-timing IE within the template as part of the invocation. 3417 * The template is valid only within the call, and the driver can 3418 * optionally copy the skb for further re-use. 3419 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both 3420 * peers must be on the base channel when the call completes. 3421 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or 3422 * response) has been received from a remote peer. The driver gets 3423 * parameters parsed from the incoming frame and may use them to continue 3424 * an ongoing channel-switch operation. In addition, a channel-switch 3425 * response template is provided, together with the location of the 3426 * switch-timing IE within the template. The skb can only be used within 3427 * the function call. 3428 * 3429 * @wake_tx_queue: Called when new packets have been added to the queue. 3430 * @sync_rx_queues: Process all pending frames in RSS queues. This is a 3431 * synchronization which is needed in case driver has in its RSS queues 3432 * pending frames that were received prior to the control path action 3433 * currently taken (e.g. disassociation) but are not processed yet. 3434 * 3435 * @start_nan: join an existing NAN cluster, or create a new one. 3436 * @stop_nan: leave the NAN cluster. 3437 * @nan_change_conf: change NAN configuration. The data in cfg80211_nan_conf 3438 * contains full new configuration and changes specify which parameters 3439 * are changed with respect to the last NAN config. 3440 * The driver gets both full configuration and the changed parameters since 3441 * some devices may need the full configuration while others need only the 3442 * changed parameters. 3443 * @add_nan_func: Add a NAN function. Returns 0 on success. The data in 3444 * cfg80211_nan_func must not be referenced outside the scope of 3445 * this call. 3446 * @del_nan_func: Remove a NAN function. The driver must call 3447 * ieee80211_nan_func_terminated() with 3448 * NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST reason code upon removal. 3449 */ 3450 struct ieee80211_ops { 3451 void (*tx)(struct ieee80211_hw *hw, 3452 struct ieee80211_tx_control *control, 3453 struct sk_buff *skb); 3454 int (*start)(struct ieee80211_hw *hw); 3455 void (*stop)(struct ieee80211_hw *hw); 3456 #ifdef CONFIG_PM 3457 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 3458 int (*resume)(struct ieee80211_hw *hw); 3459 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 3460 #endif 3461 int (*add_interface)(struct ieee80211_hw *hw, 3462 struct ieee80211_vif *vif); 3463 int (*change_interface)(struct ieee80211_hw *hw, 3464 struct ieee80211_vif *vif, 3465 enum nl80211_iftype new_type, bool p2p); 3466 void (*remove_interface)(struct ieee80211_hw *hw, 3467 struct ieee80211_vif *vif); 3468 int (*config)(struct ieee80211_hw *hw, u32 changed); 3469 void (*bss_info_changed)(struct ieee80211_hw *hw, 3470 struct ieee80211_vif *vif, 3471 struct ieee80211_bss_conf *info, 3472 u32 changed); 3473 3474 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3475 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3476 3477 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 3478 struct netdev_hw_addr_list *mc_list); 3479 void (*configure_filter)(struct ieee80211_hw *hw, 3480 unsigned int changed_flags, 3481 unsigned int *total_flags, 3482 u64 multicast); 3483 void (*config_iface_filter)(struct ieee80211_hw *hw, 3484 struct ieee80211_vif *vif, 3485 unsigned int filter_flags, 3486 unsigned int changed_flags); 3487 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3488 bool set); 3489 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 3490 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 3491 struct ieee80211_key_conf *key); 3492 void (*update_tkip_key)(struct ieee80211_hw *hw, 3493 struct ieee80211_vif *vif, 3494 struct ieee80211_key_conf *conf, 3495 struct ieee80211_sta *sta, 3496 u32 iv32, u16 *phase1key); 3497 void (*set_rekey_data)(struct ieee80211_hw *hw, 3498 struct ieee80211_vif *vif, 3499 struct cfg80211_gtk_rekey_data *data); 3500 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 3501 struct ieee80211_vif *vif, int idx); 3502 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3503 struct ieee80211_scan_request *req); 3504 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 3505 struct ieee80211_vif *vif); 3506 int (*sched_scan_start)(struct ieee80211_hw *hw, 3507 struct ieee80211_vif *vif, 3508 struct cfg80211_sched_scan_request *req, 3509 struct ieee80211_scan_ies *ies); 3510 int (*sched_scan_stop)(struct ieee80211_hw *hw, 3511 struct ieee80211_vif *vif); 3512 void (*sw_scan_start)(struct ieee80211_hw *hw, 3513 struct ieee80211_vif *vif, 3514 const u8 *mac_addr); 3515 void (*sw_scan_complete)(struct ieee80211_hw *hw, 3516 struct ieee80211_vif *vif); 3517 int (*get_stats)(struct ieee80211_hw *hw, 3518 struct ieee80211_low_level_stats *stats); 3519 void (*get_key_seq)(struct ieee80211_hw *hw, 3520 struct ieee80211_key_conf *key, 3521 struct ieee80211_key_seq *seq); 3522 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 3523 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 3524 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3525 struct ieee80211_sta *sta); 3526 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3527 struct ieee80211_sta *sta); 3528 #ifdef CONFIG_MAC80211_DEBUGFS 3529 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 3530 struct ieee80211_vif *vif, 3531 struct ieee80211_sta *sta, 3532 struct dentry *dir); 3533 #endif 3534 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3535 enum sta_notify_cmd, struct ieee80211_sta *sta); 3536 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3537 struct ieee80211_sta *sta, 3538 enum ieee80211_sta_state old_state, 3539 enum ieee80211_sta_state new_state); 3540 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 3541 struct ieee80211_vif *vif, 3542 struct ieee80211_sta *sta); 3543 void (*sta_rc_update)(struct ieee80211_hw *hw, 3544 struct ieee80211_vif *vif, 3545 struct ieee80211_sta *sta, 3546 u32 changed); 3547 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw, 3548 struct ieee80211_vif *vif, 3549 struct ieee80211_sta *sta); 3550 void (*sta_statistics)(struct ieee80211_hw *hw, 3551 struct ieee80211_vif *vif, 3552 struct ieee80211_sta *sta, 3553 struct station_info *sinfo); 3554 int (*conf_tx)(struct ieee80211_hw *hw, 3555 struct ieee80211_vif *vif, u16 ac, 3556 const struct ieee80211_tx_queue_params *params); 3557 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3558 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3559 u64 tsf); 3560 void (*offset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3561 s64 offset); 3562 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3563 int (*tx_last_beacon)(struct ieee80211_hw *hw); 3564 int (*ampdu_action)(struct ieee80211_hw *hw, 3565 struct ieee80211_vif *vif, 3566 struct ieee80211_ampdu_params *params); 3567 int (*get_survey)(struct ieee80211_hw *hw, int idx, 3568 struct survey_info *survey); 3569 void (*rfkill_poll)(struct ieee80211_hw *hw); 3570 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class); 3571 #ifdef CONFIG_NL80211_TESTMODE 3572 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3573 void *data, int len); 3574 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 3575 struct netlink_callback *cb, 3576 void *data, int len); 3577 #endif 3578 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3579 u32 queues, bool drop); 3580 void (*channel_switch)(struct ieee80211_hw *hw, 3581 struct ieee80211_vif *vif, 3582 struct ieee80211_channel_switch *ch_switch); 3583 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 3584 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 3585 3586 int (*remain_on_channel)(struct ieee80211_hw *hw, 3587 struct ieee80211_vif *vif, 3588 struct ieee80211_channel *chan, 3589 int duration, 3590 enum ieee80211_roc_type type); 3591 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 3592 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 3593 void (*get_ringparam)(struct ieee80211_hw *hw, 3594 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 3595 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 3596 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3597 const struct cfg80211_bitrate_mask *mask); 3598 void (*event_callback)(struct ieee80211_hw *hw, 3599 struct ieee80211_vif *vif, 3600 const struct ieee80211_event *event); 3601 3602 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 3603 struct ieee80211_sta *sta, 3604 u16 tids, int num_frames, 3605 enum ieee80211_frame_release_type reason, 3606 bool more_data); 3607 void (*release_buffered_frames)(struct ieee80211_hw *hw, 3608 struct ieee80211_sta *sta, 3609 u16 tids, int num_frames, 3610 enum ieee80211_frame_release_type reason, 3611 bool more_data); 3612 3613 int (*get_et_sset_count)(struct ieee80211_hw *hw, 3614 struct ieee80211_vif *vif, int sset); 3615 void (*get_et_stats)(struct ieee80211_hw *hw, 3616 struct ieee80211_vif *vif, 3617 struct ethtool_stats *stats, u64 *data); 3618 void (*get_et_strings)(struct ieee80211_hw *hw, 3619 struct ieee80211_vif *vif, 3620 u32 sset, u8 *data); 3621 3622 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 3623 struct ieee80211_vif *vif); 3624 3625 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw, 3626 struct ieee80211_vif *vif); 3627 3628 int (*add_chanctx)(struct ieee80211_hw *hw, 3629 struct ieee80211_chanctx_conf *ctx); 3630 void (*remove_chanctx)(struct ieee80211_hw *hw, 3631 struct ieee80211_chanctx_conf *ctx); 3632 void (*change_chanctx)(struct ieee80211_hw *hw, 3633 struct ieee80211_chanctx_conf *ctx, 3634 u32 changed); 3635 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 3636 struct ieee80211_vif *vif, 3637 struct ieee80211_chanctx_conf *ctx); 3638 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 3639 struct ieee80211_vif *vif, 3640 struct ieee80211_chanctx_conf *ctx); 3641 int (*switch_vif_chanctx)(struct ieee80211_hw *hw, 3642 struct ieee80211_vif_chanctx_switch *vifs, 3643 int n_vifs, 3644 enum ieee80211_chanctx_switch_mode mode); 3645 3646 void (*reconfig_complete)(struct ieee80211_hw *hw, 3647 enum ieee80211_reconfig_type reconfig_type); 3648 3649 #if IS_ENABLED(CONFIG_IPV6) 3650 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 3651 struct ieee80211_vif *vif, 3652 struct inet6_dev *idev); 3653 #endif 3654 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 3655 struct ieee80211_vif *vif, 3656 struct cfg80211_chan_def *chandef); 3657 int (*pre_channel_switch)(struct ieee80211_hw *hw, 3658 struct ieee80211_vif *vif, 3659 struct ieee80211_channel_switch *ch_switch); 3660 3661 int (*post_channel_switch)(struct ieee80211_hw *hw, 3662 struct ieee80211_vif *vif); 3663 3664 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3665 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3666 u32 (*get_expected_throughput)(struct ieee80211_hw *hw, 3667 struct ieee80211_sta *sta); 3668 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3669 int *dbm); 3670 3671 int (*tdls_channel_switch)(struct ieee80211_hw *hw, 3672 struct ieee80211_vif *vif, 3673 struct ieee80211_sta *sta, u8 oper_class, 3674 struct cfg80211_chan_def *chandef, 3675 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie); 3676 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw, 3677 struct ieee80211_vif *vif, 3678 struct ieee80211_sta *sta); 3679 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, 3680 struct ieee80211_vif *vif, 3681 struct ieee80211_tdls_ch_sw_params *params); 3682 3683 void (*wake_tx_queue)(struct ieee80211_hw *hw, 3684 struct ieee80211_txq *txq); 3685 void (*sync_rx_queues)(struct ieee80211_hw *hw); 3686 3687 int (*start_nan)(struct ieee80211_hw *hw, 3688 struct ieee80211_vif *vif, 3689 struct cfg80211_nan_conf *conf); 3690 int (*stop_nan)(struct ieee80211_hw *hw, 3691 struct ieee80211_vif *vif); 3692 int (*nan_change_conf)(struct ieee80211_hw *hw, 3693 struct ieee80211_vif *vif, 3694 struct cfg80211_nan_conf *conf, u32 changes); 3695 int (*add_nan_func)(struct ieee80211_hw *hw, 3696 struct ieee80211_vif *vif, 3697 const struct cfg80211_nan_func *nan_func); 3698 void (*del_nan_func)(struct ieee80211_hw *hw, 3699 struct ieee80211_vif *vif, 3700 u8 instance_id); 3701 }; 3702 3703 /** 3704 * ieee80211_alloc_hw_nm - Allocate a new hardware device 3705 * 3706 * This must be called once for each hardware device. The returned pointer 3707 * must be used to refer to this device when calling other functions. 3708 * mac80211 allocates a private data area for the driver pointed to by 3709 * @priv in &struct ieee80211_hw, the size of this area is given as 3710 * @priv_data_len. 3711 * 3712 * @priv_data_len: length of private data 3713 * @ops: callbacks for this device 3714 * @requested_name: Requested name for this device. 3715 * NULL is valid value, and means use the default naming (phy%d) 3716 * 3717 * Return: A pointer to the new hardware device, or %NULL on error. 3718 */ 3719 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 3720 const struct ieee80211_ops *ops, 3721 const char *requested_name); 3722 3723 /** 3724 * ieee80211_alloc_hw - Allocate a new hardware device 3725 * 3726 * This must be called once for each hardware device. The returned pointer 3727 * must be used to refer to this device when calling other functions. 3728 * mac80211 allocates a private data area for the driver pointed to by 3729 * @priv in &struct ieee80211_hw, the size of this area is given as 3730 * @priv_data_len. 3731 * 3732 * @priv_data_len: length of private data 3733 * @ops: callbacks for this device 3734 * 3735 * Return: A pointer to the new hardware device, or %NULL on error. 3736 */ 3737 static inline 3738 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 3739 const struct ieee80211_ops *ops) 3740 { 3741 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL); 3742 } 3743 3744 /** 3745 * ieee80211_register_hw - Register hardware device 3746 * 3747 * You must call this function before any other functions in 3748 * mac80211. Note that before a hardware can be registered, you 3749 * need to fill the contained wiphy's information. 3750 * 3751 * @hw: the device to register as returned by ieee80211_alloc_hw() 3752 * 3753 * Return: 0 on success. An error code otherwise. 3754 */ 3755 int ieee80211_register_hw(struct ieee80211_hw *hw); 3756 3757 /** 3758 * struct ieee80211_tpt_blink - throughput blink description 3759 * @throughput: throughput in Kbit/sec 3760 * @blink_time: blink time in milliseconds 3761 * (full cycle, ie. one off + one on period) 3762 */ 3763 struct ieee80211_tpt_blink { 3764 int throughput; 3765 int blink_time; 3766 }; 3767 3768 /** 3769 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3770 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3771 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3772 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3773 * interface is connected in some way, including being an AP 3774 */ 3775 enum ieee80211_tpt_led_trigger_flags { 3776 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3777 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3778 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3779 }; 3780 3781 #ifdef CONFIG_MAC80211_LEDS 3782 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3783 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3784 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3785 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3786 const char * 3787 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3788 unsigned int flags, 3789 const struct ieee80211_tpt_blink *blink_table, 3790 unsigned int blink_table_len); 3791 #endif 3792 /** 3793 * ieee80211_get_tx_led_name - get name of TX LED 3794 * 3795 * mac80211 creates a transmit LED trigger for each wireless hardware 3796 * that can be used to drive LEDs if your driver registers a LED device. 3797 * This function returns the name (or %NULL if not configured for LEDs) 3798 * of the trigger so you can automatically link the LED device. 3799 * 3800 * @hw: the hardware to get the LED trigger name for 3801 * 3802 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3803 */ 3804 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3805 { 3806 #ifdef CONFIG_MAC80211_LEDS 3807 return __ieee80211_get_tx_led_name(hw); 3808 #else 3809 return NULL; 3810 #endif 3811 } 3812 3813 /** 3814 * ieee80211_get_rx_led_name - get name of RX LED 3815 * 3816 * mac80211 creates a receive LED trigger for each wireless hardware 3817 * that can be used to drive LEDs if your driver registers a LED device. 3818 * This function returns the name (or %NULL if not configured for LEDs) 3819 * of the trigger so you can automatically link the LED device. 3820 * 3821 * @hw: the hardware to get the LED trigger name for 3822 * 3823 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3824 */ 3825 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3826 { 3827 #ifdef CONFIG_MAC80211_LEDS 3828 return __ieee80211_get_rx_led_name(hw); 3829 #else 3830 return NULL; 3831 #endif 3832 } 3833 3834 /** 3835 * ieee80211_get_assoc_led_name - get name of association LED 3836 * 3837 * mac80211 creates a association LED trigger for each wireless hardware 3838 * that can be used to drive LEDs if your driver registers a LED device. 3839 * This function returns the name (or %NULL if not configured for LEDs) 3840 * of the trigger so you can automatically link the LED device. 3841 * 3842 * @hw: the hardware to get the LED trigger name for 3843 * 3844 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3845 */ 3846 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3847 { 3848 #ifdef CONFIG_MAC80211_LEDS 3849 return __ieee80211_get_assoc_led_name(hw); 3850 #else 3851 return NULL; 3852 #endif 3853 } 3854 3855 /** 3856 * ieee80211_get_radio_led_name - get name of radio LED 3857 * 3858 * mac80211 creates a radio change LED trigger for each wireless hardware 3859 * that can be used to drive LEDs if your driver registers a LED device. 3860 * This function returns the name (or %NULL if not configured for LEDs) 3861 * of the trigger so you can automatically link the LED device. 3862 * 3863 * @hw: the hardware to get the LED trigger name for 3864 * 3865 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3866 */ 3867 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3868 { 3869 #ifdef CONFIG_MAC80211_LEDS 3870 return __ieee80211_get_radio_led_name(hw); 3871 #else 3872 return NULL; 3873 #endif 3874 } 3875 3876 /** 3877 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3878 * @hw: the hardware to create the trigger for 3879 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3880 * @blink_table: the blink table -- needs to be ordered by throughput 3881 * @blink_table_len: size of the blink table 3882 * 3883 * Return: %NULL (in case of error, or if no LED triggers are 3884 * configured) or the name of the new trigger. 3885 * 3886 * Note: This function must be called before ieee80211_register_hw(). 3887 */ 3888 static inline const char * 3889 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3890 const struct ieee80211_tpt_blink *blink_table, 3891 unsigned int blink_table_len) 3892 { 3893 #ifdef CONFIG_MAC80211_LEDS 3894 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3895 blink_table_len); 3896 #else 3897 return NULL; 3898 #endif 3899 } 3900 3901 /** 3902 * ieee80211_unregister_hw - Unregister a hardware device 3903 * 3904 * This function instructs mac80211 to free allocated resources 3905 * and unregister netdevices from the networking subsystem. 3906 * 3907 * @hw: the hardware to unregister 3908 */ 3909 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3910 3911 /** 3912 * ieee80211_free_hw - free hardware descriptor 3913 * 3914 * This function frees everything that was allocated, including the 3915 * private data for the driver. You must call ieee80211_unregister_hw() 3916 * before calling this function. 3917 * 3918 * @hw: the hardware to free 3919 */ 3920 void ieee80211_free_hw(struct ieee80211_hw *hw); 3921 3922 /** 3923 * ieee80211_restart_hw - restart hardware completely 3924 * 3925 * Call this function when the hardware was restarted for some reason 3926 * (hardware error, ...) and the driver is unable to restore its state 3927 * by itself. mac80211 assumes that at this point the driver/hardware 3928 * is completely uninitialised and stopped, it starts the process by 3929 * calling the ->start() operation. The driver will need to reset all 3930 * internal state that it has prior to calling this function. 3931 * 3932 * @hw: the hardware to restart 3933 */ 3934 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3935 3936 /** 3937 * ieee80211_rx_napi - receive frame from NAPI context 3938 * 3939 * Use this function to hand received frames to mac80211. The receive 3940 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3941 * paged @skb is used, the driver is recommended to put the ieee80211 3942 * header of the frame on the linear part of the @skb to avoid memory 3943 * allocation and/or memcpy by the stack. 3944 * 3945 * This function may not be called in IRQ context. Calls to this function 3946 * for a single hardware must be synchronized against each other. Calls to 3947 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3948 * mixed for a single hardware. Must not run concurrently with 3949 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3950 * 3951 * This function must be called with BHs disabled. 3952 * 3953 * @hw: the hardware this frame came in on 3954 * @sta: the station the frame was received from, or %NULL 3955 * @skb: the buffer to receive, owned by mac80211 after this call 3956 * @napi: the NAPI context 3957 */ 3958 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3959 struct sk_buff *skb, struct napi_struct *napi); 3960 3961 /** 3962 * ieee80211_rx - receive frame 3963 * 3964 * Use this function to hand received frames to mac80211. The receive 3965 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3966 * paged @skb is used, the driver is recommended to put the ieee80211 3967 * header of the frame on the linear part of the @skb to avoid memory 3968 * allocation and/or memcpy by the stack. 3969 * 3970 * This function may not be called in IRQ context. Calls to this function 3971 * for a single hardware must be synchronized against each other. Calls to 3972 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3973 * mixed for a single hardware. Must not run concurrently with 3974 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3975 * 3976 * In process context use instead ieee80211_rx_ni(). 3977 * 3978 * @hw: the hardware this frame came in on 3979 * @skb: the buffer to receive, owned by mac80211 after this call 3980 */ 3981 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 3982 { 3983 ieee80211_rx_napi(hw, NULL, skb, NULL); 3984 } 3985 3986 /** 3987 * ieee80211_rx_irqsafe - receive frame 3988 * 3989 * Like ieee80211_rx() but can be called in IRQ context 3990 * (internally defers to a tasklet.) 3991 * 3992 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3993 * be mixed for a single hardware.Must not run concurrently with 3994 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3995 * 3996 * @hw: the hardware this frame came in on 3997 * @skb: the buffer to receive, owned by mac80211 after this call 3998 */ 3999 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 4000 4001 /** 4002 * ieee80211_rx_ni - receive frame (in process context) 4003 * 4004 * Like ieee80211_rx() but can be called in process context 4005 * (internally disables bottom halves). 4006 * 4007 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 4008 * not be mixed for a single hardware. Must not run concurrently with 4009 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 4010 * 4011 * @hw: the hardware this frame came in on 4012 * @skb: the buffer to receive, owned by mac80211 after this call 4013 */ 4014 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 4015 struct sk_buff *skb) 4016 { 4017 local_bh_disable(); 4018 ieee80211_rx(hw, skb); 4019 local_bh_enable(); 4020 } 4021 4022 /** 4023 * ieee80211_sta_ps_transition - PS transition for connected sta 4024 * 4025 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 4026 * flag set, use this function to inform mac80211 about a connected station 4027 * entering/leaving PS mode. 4028 * 4029 * This function may not be called in IRQ context or with softirqs enabled. 4030 * 4031 * Calls to this function for a single hardware must be synchronized against 4032 * each other. 4033 * 4034 * @sta: currently connected sta 4035 * @start: start or stop PS 4036 * 4037 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 4038 */ 4039 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 4040 4041 /** 4042 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 4043 * (in process context) 4044 * 4045 * Like ieee80211_sta_ps_transition() but can be called in process context 4046 * (internally disables bottom halves). Concurrent call restriction still 4047 * applies. 4048 * 4049 * @sta: currently connected sta 4050 * @start: start or stop PS 4051 * 4052 * Return: Like ieee80211_sta_ps_transition(). 4053 */ 4054 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 4055 bool start) 4056 { 4057 int ret; 4058 4059 local_bh_disable(); 4060 ret = ieee80211_sta_ps_transition(sta, start); 4061 local_bh_enable(); 4062 4063 return ret; 4064 } 4065 4066 /** 4067 * ieee80211_sta_pspoll - PS-Poll frame received 4068 * @sta: currently connected station 4069 * 4070 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4071 * use this function to inform mac80211 that a PS-Poll frame from a 4072 * connected station was received. 4073 * This must be used in conjunction with ieee80211_sta_ps_transition() 4074 * and possibly ieee80211_sta_uapsd_trigger(); calls to all three must 4075 * be serialized. 4076 */ 4077 void ieee80211_sta_pspoll(struct ieee80211_sta *sta); 4078 4079 /** 4080 * ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received 4081 * @sta: currently connected station 4082 * @tid: TID of the received (potential) trigger frame 4083 * 4084 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4085 * use this function to inform mac80211 that a (potential) trigger frame 4086 * from a connected station was received. 4087 * This must be used in conjunction with ieee80211_sta_ps_transition() 4088 * and possibly ieee80211_sta_pspoll(); calls to all three must be 4089 * serialized. 4090 */ 4091 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid); 4092 4093 /* 4094 * The TX headroom reserved by mac80211 for its own tx_status functions. 4095 * This is enough for the radiotap header. 4096 */ 4097 #define IEEE80211_TX_STATUS_HEADROOM 14 4098 4099 /** 4100 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 4101 * @sta: &struct ieee80211_sta pointer for the sleeping station 4102 * @tid: the TID that has buffered frames 4103 * @buffered: indicates whether or not frames are buffered for this TID 4104 * 4105 * If a driver buffers frames for a powersave station instead of passing 4106 * them back to mac80211 for retransmission, the station may still need 4107 * to be told that there are buffered frames via the TIM bit. 4108 * 4109 * This function informs mac80211 whether or not there are frames that are 4110 * buffered in the driver for a given TID; mac80211 can then use this data 4111 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 4112 * call! Beware of the locking!) 4113 * 4114 * If all frames are released to the station (due to PS-poll or uAPSD) 4115 * then the driver needs to inform mac80211 that there no longer are 4116 * frames buffered. However, when the station wakes up mac80211 assumes 4117 * that all buffered frames will be transmitted and clears this data, 4118 * drivers need to make sure they inform mac80211 about all buffered 4119 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 4120 * 4121 * Note that technically mac80211 only needs to know this per AC, not per 4122 * TID, but since driver buffering will inevitably happen per TID (since 4123 * it is related to aggregation) it is easier to make mac80211 map the 4124 * TID to the AC as required instead of keeping track in all drivers that 4125 * use this API. 4126 */ 4127 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 4128 u8 tid, bool buffered); 4129 4130 /** 4131 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 4132 * 4133 * Call this function in a driver with per-packet rate selection support 4134 * to combine the rate info in the packet tx info with the most recent 4135 * rate selection table for the station entry. 4136 * 4137 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4138 * @sta: the receiver station to which this packet is sent. 4139 * @skb: the frame to be transmitted. 4140 * @dest: buffer for extracted rate/retry information 4141 * @max_rates: maximum number of rates to fetch 4142 */ 4143 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 4144 struct ieee80211_sta *sta, 4145 struct sk_buff *skb, 4146 struct ieee80211_tx_rate *dest, 4147 int max_rates); 4148 4149 /** 4150 * ieee80211_tx_status - transmit status callback 4151 * 4152 * Call this function for all transmitted frames after they have been 4153 * transmitted. It is permissible to not call this function for 4154 * multicast frames but this can affect statistics. 4155 * 4156 * This function may not be called in IRQ context. Calls to this function 4157 * for a single hardware must be synchronized against each other. Calls 4158 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 4159 * may not be mixed for a single hardware. Must not run concurrently with 4160 * ieee80211_rx() or ieee80211_rx_ni(). 4161 * 4162 * @hw: the hardware the frame was transmitted by 4163 * @skb: the frame that was transmitted, owned by mac80211 after this call 4164 */ 4165 void ieee80211_tx_status(struct ieee80211_hw *hw, 4166 struct sk_buff *skb); 4167 4168 /** 4169 * ieee80211_tx_status_noskb - transmit status callback without skb 4170 * 4171 * This function can be used as a replacement for ieee80211_tx_status 4172 * in drivers that cannot reliably map tx status information back to 4173 * specific skbs. 4174 * 4175 * Calls to this function for a single hardware must be synchronized 4176 * against each other. Calls to this function, ieee80211_tx_status_ni() 4177 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware. 4178 * 4179 * @hw: the hardware the frame was transmitted by 4180 * @sta: the receiver station to which this packet is sent 4181 * (NULL for multicast packets) 4182 * @info: tx status information 4183 */ 4184 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 4185 struct ieee80211_sta *sta, 4186 struct ieee80211_tx_info *info); 4187 4188 /** 4189 * ieee80211_tx_status_ni - transmit status callback (in process context) 4190 * 4191 * Like ieee80211_tx_status() but can be called in process context. 4192 * 4193 * Calls to this function, ieee80211_tx_status() and 4194 * ieee80211_tx_status_irqsafe() may not be mixed 4195 * for a single hardware. 4196 * 4197 * @hw: the hardware the frame was transmitted by 4198 * @skb: the frame that was transmitted, owned by mac80211 after this call 4199 */ 4200 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 4201 struct sk_buff *skb) 4202 { 4203 local_bh_disable(); 4204 ieee80211_tx_status(hw, skb); 4205 local_bh_enable(); 4206 } 4207 4208 /** 4209 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 4210 * 4211 * Like ieee80211_tx_status() but can be called in IRQ context 4212 * (internally defers to a tasklet.) 4213 * 4214 * Calls to this function, ieee80211_tx_status() and 4215 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 4216 * 4217 * @hw: the hardware the frame was transmitted by 4218 * @skb: the frame that was transmitted, owned by mac80211 after this call 4219 */ 4220 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 4221 struct sk_buff *skb); 4222 4223 /** 4224 * ieee80211_report_low_ack - report non-responding station 4225 * 4226 * When operating in AP-mode, call this function to report a non-responding 4227 * connected STA. 4228 * 4229 * @sta: the non-responding connected sta 4230 * @num_packets: number of packets sent to @sta without a response 4231 */ 4232 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 4233 4234 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2 4235 4236 /** 4237 * struct ieee80211_mutable_offsets - mutable beacon offsets 4238 * @tim_offset: position of TIM element 4239 * @tim_length: size of TIM element 4240 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 4241 * to CSA counters. This array can contain zero values which 4242 * should be ignored. 4243 */ 4244 struct ieee80211_mutable_offsets { 4245 u16 tim_offset; 4246 u16 tim_length; 4247 4248 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 4249 }; 4250 4251 /** 4252 * ieee80211_beacon_get_template - beacon template generation function 4253 * @hw: pointer obtained from ieee80211_alloc_hw(). 4254 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4255 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 4256 * receive the offsets that may be updated by the driver. 4257 * 4258 * If the driver implements beaconing modes, it must use this function to 4259 * obtain the beacon template. 4260 * 4261 * This function should be used if the beacon frames are generated by the 4262 * device, and then the driver must use the returned beacon as the template 4263 * The driver or the device are responsible to update the DTIM and, when 4264 * applicable, the CSA count. 4265 * 4266 * The driver is responsible for freeing the returned skb. 4267 * 4268 * Return: The beacon template. %NULL on error. 4269 */ 4270 struct sk_buff * 4271 ieee80211_beacon_get_template(struct ieee80211_hw *hw, 4272 struct ieee80211_vif *vif, 4273 struct ieee80211_mutable_offsets *offs); 4274 4275 /** 4276 * ieee80211_beacon_get_tim - beacon generation function 4277 * @hw: pointer obtained from ieee80211_alloc_hw(). 4278 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4279 * @tim_offset: pointer to variable that will receive the TIM IE offset. 4280 * Set to 0 if invalid (in non-AP modes). 4281 * @tim_length: pointer to variable that will receive the TIM IE length, 4282 * (including the ID and length bytes!). 4283 * Set to 0 if invalid (in non-AP modes). 4284 * 4285 * If the driver implements beaconing modes, it must use this function to 4286 * obtain the beacon frame. 4287 * 4288 * If the beacon frames are generated by the host system (i.e., not in 4289 * hardware/firmware), the driver uses this function to get each beacon 4290 * frame from mac80211 -- it is responsible for calling this function exactly 4291 * once before the beacon is needed (e.g. based on hardware interrupt). 4292 * 4293 * The driver is responsible for freeing the returned skb. 4294 * 4295 * Return: The beacon template. %NULL on error. 4296 */ 4297 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 4298 struct ieee80211_vif *vif, 4299 u16 *tim_offset, u16 *tim_length); 4300 4301 /** 4302 * ieee80211_beacon_get - beacon generation function 4303 * @hw: pointer obtained from ieee80211_alloc_hw(). 4304 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4305 * 4306 * See ieee80211_beacon_get_tim(). 4307 * 4308 * Return: See ieee80211_beacon_get_tim(). 4309 */ 4310 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 4311 struct ieee80211_vif *vif) 4312 { 4313 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 4314 } 4315 4316 /** 4317 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 4318 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4319 * 4320 * The csa counter should be updated after each beacon transmission. 4321 * This function is called implicitly when 4322 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 4323 * beacon frames are generated by the device, the driver should call this 4324 * function after each beacon transmission to sync mac80211's csa counters. 4325 * 4326 * Return: new csa counter value 4327 */ 4328 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 4329 4330 /** 4331 * ieee80211_csa_finish - notify mac80211 about channel switch 4332 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4333 * 4334 * After a channel switch announcement was scheduled and the counter in this 4335 * announcement hits 1, this function must be called by the driver to 4336 * notify mac80211 that the channel can be changed. 4337 */ 4338 void ieee80211_csa_finish(struct ieee80211_vif *vif); 4339 4340 /** 4341 * ieee80211_csa_is_complete - find out if counters reached 1 4342 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4343 * 4344 * This function returns whether the channel switch counters reached zero. 4345 */ 4346 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 4347 4348 4349 /** 4350 * ieee80211_proberesp_get - retrieve a Probe Response template 4351 * @hw: pointer obtained from ieee80211_alloc_hw(). 4352 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4353 * 4354 * Creates a Probe Response template which can, for example, be uploaded to 4355 * hardware. The destination address should be set by the caller. 4356 * 4357 * Can only be called in AP mode. 4358 * 4359 * Return: The Probe Response template. %NULL on error. 4360 */ 4361 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 4362 struct ieee80211_vif *vif); 4363 4364 /** 4365 * ieee80211_pspoll_get - retrieve a PS Poll template 4366 * @hw: pointer obtained from ieee80211_alloc_hw(). 4367 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4368 * 4369 * Creates a PS Poll a template which can, for example, uploaded to 4370 * hardware. The template must be updated after association so that correct 4371 * AID, BSSID and MAC address is used. 4372 * 4373 * Note: Caller (or hardware) is responsible for setting the 4374 * &IEEE80211_FCTL_PM bit. 4375 * 4376 * Return: The PS Poll template. %NULL on error. 4377 */ 4378 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 4379 struct ieee80211_vif *vif); 4380 4381 /** 4382 * ieee80211_nullfunc_get - retrieve a nullfunc template 4383 * @hw: pointer obtained from ieee80211_alloc_hw(). 4384 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4385 * 4386 * Creates a Nullfunc template which can, for example, uploaded to 4387 * hardware. The template must be updated after association so that correct 4388 * BSSID and address is used. 4389 * 4390 * Note: Caller (or hardware) is responsible for setting the 4391 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 4392 * 4393 * Return: The nullfunc template. %NULL on error. 4394 */ 4395 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 4396 struct ieee80211_vif *vif); 4397 4398 /** 4399 * ieee80211_probereq_get - retrieve a Probe Request template 4400 * @hw: pointer obtained from ieee80211_alloc_hw(). 4401 * @src_addr: source MAC address 4402 * @ssid: SSID buffer 4403 * @ssid_len: length of SSID 4404 * @tailroom: tailroom to reserve at end of SKB for IEs 4405 * 4406 * Creates a Probe Request template which can, for example, be uploaded to 4407 * hardware. 4408 * 4409 * Return: The Probe Request template. %NULL on error. 4410 */ 4411 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 4412 const u8 *src_addr, 4413 const u8 *ssid, size_t ssid_len, 4414 size_t tailroom); 4415 4416 /** 4417 * ieee80211_rts_get - RTS frame generation function 4418 * @hw: pointer obtained from ieee80211_alloc_hw(). 4419 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4420 * @frame: pointer to the frame that is going to be protected by the RTS. 4421 * @frame_len: the frame length (in octets). 4422 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4423 * @rts: The buffer where to store the RTS frame. 4424 * 4425 * If the RTS frames are generated by the host system (i.e., not in 4426 * hardware/firmware), the low-level driver uses this function to receive 4427 * the next RTS frame from the 802.11 code. The low-level is responsible 4428 * for calling this function before and RTS frame is needed. 4429 */ 4430 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 4431 const void *frame, size_t frame_len, 4432 const struct ieee80211_tx_info *frame_txctl, 4433 struct ieee80211_rts *rts); 4434 4435 /** 4436 * ieee80211_rts_duration - Get the duration field for an RTS frame 4437 * @hw: pointer obtained from ieee80211_alloc_hw(). 4438 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4439 * @frame_len: the length of the frame that is going to be protected by the RTS. 4440 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4441 * 4442 * If the RTS is generated in firmware, but the host system must provide 4443 * the duration field, the low-level driver uses this function to receive 4444 * the duration field value in little-endian byteorder. 4445 * 4446 * Return: The duration. 4447 */ 4448 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 4449 struct ieee80211_vif *vif, size_t frame_len, 4450 const struct ieee80211_tx_info *frame_txctl); 4451 4452 /** 4453 * ieee80211_ctstoself_get - CTS-to-self frame generation function 4454 * @hw: pointer obtained from ieee80211_alloc_hw(). 4455 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4456 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 4457 * @frame_len: the frame length (in octets). 4458 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4459 * @cts: The buffer where to store the CTS-to-self frame. 4460 * 4461 * If the CTS-to-self frames are generated by the host system (i.e., not in 4462 * hardware/firmware), the low-level driver uses this function to receive 4463 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 4464 * for calling this function before and CTS-to-self frame is needed. 4465 */ 4466 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 4467 struct ieee80211_vif *vif, 4468 const void *frame, size_t frame_len, 4469 const struct ieee80211_tx_info *frame_txctl, 4470 struct ieee80211_cts *cts); 4471 4472 /** 4473 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 4474 * @hw: pointer obtained from ieee80211_alloc_hw(). 4475 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4476 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 4477 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4478 * 4479 * If the CTS-to-self is generated in firmware, but the host system must provide 4480 * the duration field, the low-level driver uses this function to receive 4481 * the duration field value in little-endian byteorder. 4482 * 4483 * Return: The duration. 4484 */ 4485 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 4486 struct ieee80211_vif *vif, 4487 size_t frame_len, 4488 const struct ieee80211_tx_info *frame_txctl); 4489 4490 /** 4491 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 4492 * @hw: pointer obtained from ieee80211_alloc_hw(). 4493 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4494 * @band: the band to calculate the frame duration on 4495 * @frame_len: the length of the frame. 4496 * @rate: the rate at which the frame is going to be transmitted. 4497 * 4498 * Calculate the duration field of some generic frame, given its 4499 * length and transmission rate (in 100kbps). 4500 * 4501 * Return: The duration. 4502 */ 4503 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 4504 struct ieee80211_vif *vif, 4505 enum nl80211_band band, 4506 size_t frame_len, 4507 struct ieee80211_rate *rate); 4508 4509 /** 4510 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 4511 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4512 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4513 * 4514 * Function for accessing buffered broadcast and multicast frames. If 4515 * hardware/firmware does not implement buffering of broadcast/multicast 4516 * frames when power saving is used, 802.11 code buffers them in the host 4517 * memory. The low-level driver uses this function to fetch next buffered 4518 * frame. In most cases, this is used when generating beacon frame. 4519 * 4520 * Return: A pointer to the next buffered skb or NULL if no more buffered 4521 * frames are available. 4522 * 4523 * Note: buffered frames are returned only after DTIM beacon frame was 4524 * generated with ieee80211_beacon_get() and the low-level driver must thus 4525 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 4526 * NULL if the previous generated beacon was not DTIM, so the low-level driver 4527 * does not need to check for DTIM beacons separately and should be able to 4528 * use common code for all beacons. 4529 */ 4530 struct sk_buff * 4531 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 4532 4533 /** 4534 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 4535 * 4536 * This function returns the TKIP phase 1 key for the given IV32. 4537 * 4538 * @keyconf: the parameter passed with the set key 4539 * @iv32: IV32 to get the P1K for 4540 * @p1k: a buffer to which the key will be written, as 5 u16 values 4541 */ 4542 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 4543 u32 iv32, u16 *p1k); 4544 4545 /** 4546 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 4547 * 4548 * This function returns the TKIP phase 1 key for the IV32 taken 4549 * from the given packet. 4550 * 4551 * @keyconf: the parameter passed with the set key 4552 * @skb: the packet to take the IV32 value from that will be encrypted 4553 * with this P1K 4554 * @p1k: a buffer to which the key will be written, as 5 u16 values 4555 */ 4556 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 4557 struct sk_buff *skb, u16 *p1k) 4558 { 4559 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 4560 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 4561 u32 iv32 = get_unaligned_le32(&data[4]); 4562 4563 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 4564 } 4565 4566 /** 4567 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 4568 * 4569 * This function returns the TKIP phase 1 key for the given IV32 4570 * and transmitter address. 4571 * 4572 * @keyconf: the parameter passed with the set key 4573 * @ta: TA that will be used with the key 4574 * @iv32: IV32 to get the P1K for 4575 * @p1k: a buffer to which the key will be written, as 5 u16 values 4576 */ 4577 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 4578 const u8 *ta, u32 iv32, u16 *p1k); 4579 4580 /** 4581 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 4582 * 4583 * This function computes the TKIP RC4 key for the IV values 4584 * in the packet. 4585 * 4586 * @keyconf: the parameter passed with the set key 4587 * @skb: the packet to take the IV32/IV16 values from that will be 4588 * encrypted with this key 4589 * @p2k: a buffer to which the key will be written, 16 bytes 4590 */ 4591 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 4592 struct sk_buff *skb, u8 *p2k); 4593 4594 /** 4595 * ieee80211_tkip_add_iv - write TKIP IV and Ext. IV to pos 4596 * 4597 * @pos: start of crypto header 4598 * @keyconf: the parameter passed with the set key 4599 * @pn: PN to add 4600 * 4601 * Returns: pointer to the octet following IVs (i.e. beginning of 4602 * the packet payload) 4603 * 4604 * This function writes the tkip IV value to pos (which should 4605 * point to the crypto header) 4606 */ 4607 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn); 4608 4609 /** 4610 * ieee80211_get_key_rx_seq - get key RX sequence counter 4611 * 4612 * @keyconf: the parameter passed with the set key 4613 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4614 * the value on TID 0 is also used for non-QoS frames. For 4615 * CMAC, only TID 0 is valid. 4616 * @seq: buffer to receive the sequence data 4617 * 4618 * This function allows a driver to retrieve the current RX IV/PNs 4619 * for the given key. It must not be called if IV checking is done 4620 * by the device and not by mac80211. 4621 * 4622 * Note that this function may only be called when no RX processing 4623 * can be done concurrently. 4624 */ 4625 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 4626 int tid, struct ieee80211_key_seq *seq); 4627 4628 /** 4629 * ieee80211_set_key_rx_seq - set key RX sequence counter 4630 * 4631 * @keyconf: the parameter passed with the set key 4632 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4633 * the value on TID 0 is also used for non-QoS frames. For 4634 * CMAC, only TID 0 is valid. 4635 * @seq: new sequence data 4636 * 4637 * This function allows a driver to set the current RX IV/PNs for the 4638 * given key. This is useful when resuming from WoWLAN sleep and GTK 4639 * rekey may have been done while suspended. It should not be called 4640 * if IV checking is done by the device and not by mac80211. 4641 * 4642 * Note that this function may only be called when no RX processing 4643 * can be done concurrently. 4644 */ 4645 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 4646 int tid, struct ieee80211_key_seq *seq); 4647 4648 /** 4649 * ieee80211_remove_key - remove the given key 4650 * @keyconf: the parameter passed with the set key 4651 * 4652 * Remove the given key. If the key was uploaded to the hardware at the 4653 * time this function is called, it is not deleted in the hardware but 4654 * instead assumed to have been removed already. 4655 * 4656 * Note that due to locking considerations this function can (currently) 4657 * only be called during key iteration (ieee80211_iter_keys().) 4658 */ 4659 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 4660 4661 /** 4662 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 4663 * @vif: the virtual interface to add the key on 4664 * @keyconf: new key data 4665 * 4666 * When GTK rekeying was done while the system was suspended, (a) new 4667 * key(s) will be available. These will be needed by mac80211 for proper 4668 * RX processing, so this function allows setting them. 4669 * 4670 * The function returns the newly allocated key structure, which will 4671 * have similar contents to the passed key configuration but point to 4672 * mac80211-owned memory. In case of errors, the function returns an 4673 * ERR_PTR(), use IS_ERR() etc. 4674 * 4675 * Note that this function assumes the key isn't added to hardware 4676 * acceleration, so no TX will be done with the key. Since it's a GTK 4677 * on managed (station) networks, this is true anyway. If the driver 4678 * calls this function from the resume callback and subsequently uses 4679 * the return code 1 to reconfigure the device, this key will be part 4680 * of the reconfiguration. 4681 * 4682 * Note that the driver should also call ieee80211_set_key_rx_seq() 4683 * for the new key for each TID to set up sequence counters properly. 4684 * 4685 * IMPORTANT: If this replaces a key that is present in the hardware, 4686 * then it will attempt to remove it during this call. In many cases 4687 * this isn't what you want, so call ieee80211_remove_key() first for 4688 * the key that's being replaced. 4689 */ 4690 struct ieee80211_key_conf * 4691 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 4692 struct ieee80211_key_conf *keyconf); 4693 4694 /** 4695 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 4696 * @vif: virtual interface the rekeying was done on 4697 * @bssid: The BSSID of the AP, for checking association 4698 * @replay_ctr: the new replay counter after GTK rekeying 4699 * @gfp: allocation flags 4700 */ 4701 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 4702 const u8 *replay_ctr, gfp_t gfp); 4703 4704 /** 4705 * ieee80211_wake_queue - wake specific queue 4706 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4707 * @queue: queue number (counted from zero). 4708 * 4709 * Drivers should use this function instead of netif_wake_queue. 4710 */ 4711 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 4712 4713 /** 4714 * ieee80211_stop_queue - stop specific queue 4715 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4716 * @queue: queue number (counted from zero). 4717 * 4718 * Drivers should use this function instead of netif_stop_queue. 4719 */ 4720 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 4721 4722 /** 4723 * ieee80211_queue_stopped - test status of the queue 4724 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4725 * @queue: queue number (counted from zero). 4726 * 4727 * Drivers should use this function instead of netif_stop_queue. 4728 * 4729 * Return: %true if the queue is stopped. %false otherwise. 4730 */ 4731 4732 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 4733 4734 /** 4735 * ieee80211_stop_queues - stop all queues 4736 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4737 * 4738 * Drivers should use this function instead of netif_stop_queue. 4739 */ 4740 void ieee80211_stop_queues(struct ieee80211_hw *hw); 4741 4742 /** 4743 * ieee80211_wake_queues - wake all queues 4744 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4745 * 4746 * Drivers should use this function instead of netif_wake_queue. 4747 */ 4748 void ieee80211_wake_queues(struct ieee80211_hw *hw); 4749 4750 /** 4751 * ieee80211_scan_completed - completed hardware scan 4752 * 4753 * When hardware scan offload is used (i.e. the hw_scan() callback is 4754 * assigned) this function needs to be called by the driver to notify 4755 * mac80211 that the scan finished. This function can be called from 4756 * any context, including hardirq context. 4757 * 4758 * @hw: the hardware that finished the scan 4759 * @info: information about the completed scan 4760 */ 4761 void ieee80211_scan_completed(struct ieee80211_hw *hw, 4762 struct cfg80211_scan_info *info); 4763 4764 /** 4765 * ieee80211_sched_scan_results - got results from scheduled scan 4766 * 4767 * When a scheduled scan is running, this function needs to be called by the 4768 * driver whenever there are new scan results available. 4769 * 4770 * @hw: the hardware that is performing scheduled scans 4771 */ 4772 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4773 4774 /** 4775 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4776 * 4777 * When a scheduled scan is running, this function can be called by 4778 * the driver if it needs to stop the scan to perform another task. 4779 * Usual scenarios are drivers that cannot continue the scheduled scan 4780 * while associating, for instance. 4781 * 4782 * @hw: the hardware that is performing scheduled scans 4783 */ 4784 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4785 4786 /** 4787 * enum ieee80211_interface_iteration_flags - interface iteration flags 4788 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4789 * been added to the driver; However, note that during hardware 4790 * reconfiguration (after restart_hw) it will iterate over a new 4791 * interface and over all the existing interfaces even if they 4792 * haven't been re-added to the driver yet. 4793 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4794 * interfaces, even if they haven't been re-added to the driver yet. 4795 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). 4796 */ 4797 enum ieee80211_interface_iteration_flags { 4798 IEEE80211_IFACE_ITER_NORMAL = 0, 4799 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4800 IEEE80211_IFACE_ITER_ACTIVE = BIT(1), 4801 }; 4802 4803 /** 4804 * ieee80211_iterate_interfaces - iterate interfaces 4805 * 4806 * This function iterates over the interfaces associated with a given 4807 * hardware and calls the callback for them. This includes active as well as 4808 * inactive interfaces. This function allows the iterator function to sleep. 4809 * Will iterate over a new interface during add_interface(). 4810 * 4811 * @hw: the hardware struct of which the interfaces should be iterated over 4812 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4813 * @iterator: the iterator function to call 4814 * @data: first argument of the iterator function 4815 */ 4816 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4817 void (*iterator)(void *data, u8 *mac, 4818 struct ieee80211_vif *vif), 4819 void *data); 4820 4821 /** 4822 * ieee80211_iterate_active_interfaces - iterate active interfaces 4823 * 4824 * This function iterates over the interfaces associated with a given 4825 * hardware that are currently active and calls the callback for them. 4826 * This function allows the iterator function to sleep, when the iterator 4827 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4828 * be used. 4829 * Does not iterate over a new interface during add_interface(). 4830 * 4831 * @hw: the hardware struct of which the interfaces should be iterated over 4832 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4833 * @iterator: the iterator function to call 4834 * @data: first argument of the iterator function 4835 */ 4836 static inline void 4837 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4838 void (*iterator)(void *data, u8 *mac, 4839 struct ieee80211_vif *vif), 4840 void *data) 4841 { 4842 ieee80211_iterate_interfaces(hw, 4843 iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 4844 iterator, data); 4845 } 4846 4847 /** 4848 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4849 * 4850 * This function iterates over the interfaces associated with a given 4851 * hardware that are currently active and calls the callback for them. 4852 * This function requires the iterator callback function to be atomic, 4853 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4854 * Does not iterate over a new interface during add_interface(). 4855 * 4856 * @hw: the hardware struct of which the interfaces should be iterated over 4857 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4858 * @iterator: the iterator function to call, cannot sleep 4859 * @data: first argument of the iterator function 4860 */ 4861 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4862 u32 iter_flags, 4863 void (*iterator)(void *data, 4864 u8 *mac, 4865 struct ieee80211_vif *vif), 4866 void *data); 4867 4868 /** 4869 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4870 * 4871 * This function iterates over the interfaces associated with a given 4872 * hardware that are currently active and calls the callback for them. 4873 * This version can only be used while holding the RTNL. 4874 * 4875 * @hw: the hardware struct of which the interfaces should be iterated over 4876 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4877 * @iterator: the iterator function to call, cannot sleep 4878 * @data: first argument of the iterator function 4879 */ 4880 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4881 u32 iter_flags, 4882 void (*iterator)(void *data, 4883 u8 *mac, 4884 struct ieee80211_vif *vif), 4885 void *data); 4886 4887 /** 4888 * ieee80211_iterate_stations_atomic - iterate stations 4889 * 4890 * This function iterates over all stations associated with a given 4891 * hardware that are currently uploaded to the driver and calls the callback 4892 * function for them. 4893 * This function requires the iterator callback function to be atomic, 4894 * 4895 * @hw: the hardware struct of which the interfaces should be iterated over 4896 * @iterator: the iterator function to call, cannot sleep 4897 * @data: first argument of the iterator function 4898 */ 4899 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 4900 void (*iterator)(void *data, 4901 struct ieee80211_sta *sta), 4902 void *data); 4903 /** 4904 * ieee80211_queue_work - add work onto the mac80211 workqueue 4905 * 4906 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4907 * This helper ensures drivers are not queueing work when they should not be. 4908 * 4909 * @hw: the hardware struct for the interface we are adding work for 4910 * @work: the work we want to add onto the mac80211 workqueue 4911 */ 4912 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4913 4914 /** 4915 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4916 * 4917 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4918 * workqueue. 4919 * 4920 * @hw: the hardware struct for the interface we are adding work for 4921 * @dwork: delayable work to queue onto the mac80211 workqueue 4922 * @delay: number of jiffies to wait before queueing 4923 */ 4924 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4925 struct delayed_work *dwork, 4926 unsigned long delay); 4927 4928 /** 4929 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4930 * @sta: the station for which to start a BA session 4931 * @tid: the TID to BA on. 4932 * @timeout: session timeout value (in TUs) 4933 * 4934 * Return: success if addBA request was sent, failure otherwise 4935 * 4936 * Although mac80211/low level driver/user space application can estimate 4937 * the need to start aggregation on a certain RA/TID, the session level 4938 * will be managed by the mac80211. 4939 */ 4940 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4941 u16 timeout); 4942 4943 /** 4944 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4945 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4946 * @ra: receiver address of the BA session recipient. 4947 * @tid: the TID to BA on. 4948 * 4949 * This function must be called by low level driver once it has 4950 * finished with preparations for the BA session. It can be called 4951 * from any context. 4952 */ 4953 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4954 u16 tid); 4955 4956 /** 4957 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4958 * @sta: the station whose BA session to stop 4959 * @tid: the TID to stop BA. 4960 * 4961 * Return: negative error if the TID is invalid, or no aggregation active 4962 * 4963 * Although mac80211/low level driver/user space application can estimate 4964 * the need to stop aggregation on a certain RA/TID, the session level 4965 * will be managed by the mac80211. 4966 */ 4967 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4968 4969 /** 4970 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4971 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4972 * @ra: receiver address of the BA session recipient. 4973 * @tid: the desired TID to BA on. 4974 * 4975 * This function must be called by low level driver once it has 4976 * finished with preparations for the BA session tear down. It 4977 * can be called from any context. 4978 */ 4979 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4980 u16 tid); 4981 4982 /** 4983 * ieee80211_find_sta - find a station 4984 * 4985 * @vif: virtual interface to look for station on 4986 * @addr: station's address 4987 * 4988 * Return: The station, if found. %NULL otherwise. 4989 * 4990 * Note: This function must be called under RCU lock and the 4991 * resulting pointer is only valid under RCU lock as well. 4992 */ 4993 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4994 const u8 *addr); 4995 4996 /** 4997 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4998 * 4999 * @hw: pointer as obtained from ieee80211_alloc_hw() 5000 * @addr: remote station's address 5001 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 5002 * 5003 * Return: The station, if found. %NULL otherwise. 5004 * 5005 * Note: This function must be called under RCU lock and the 5006 * resulting pointer is only valid under RCU lock as well. 5007 * 5008 * NOTE: You may pass NULL for localaddr, but then you will just get 5009 * the first STA that matches the remote address 'addr'. 5010 * We can have multiple STA associated with multiple 5011 * logical stations (e.g. consider a station connecting to another 5012 * BSSID on the same AP hardware without disconnecting first). 5013 * In this case, the result of this method with localaddr NULL 5014 * is not reliable. 5015 * 5016 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 5017 */ 5018 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 5019 const u8 *addr, 5020 const u8 *localaddr); 5021 5022 /** 5023 * ieee80211_sta_block_awake - block station from waking up 5024 * @hw: the hardware 5025 * @pubsta: the station 5026 * @block: whether to block or unblock 5027 * 5028 * Some devices require that all frames that are on the queues 5029 * for a specific station that went to sleep are flushed before 5030 * a poll response or frames after the station woke up can be 5031 * delivered to that it. Note that such frames must be rejected 5032 * by the driver as filtered, with the appropriate status flag. 5033 * 5034 * This function allows implementing this mode in a race-free 5035 * manner. 5036 * 5037 * To do this, a driver must keep track of the number of frames 5038 * still enqueued for a specific station. If this number is not 5039 * zero when the station goes to sleep, the driver must call 5040 * this function to force mac80211 to consider the station to 5041 * be asleep regardless of the station's actual state. Once the 5042 * number of outstanding frames reaches zero, the driver must 5043 * call this function again to unblock the station. That will 5044 * cause mac80211 to be able to send ps-poll responses, and if 5045 * the station queried in the meantime then frames will also 5046 * be sent out as a result of this. Additionally, the driver 5047 * will be notified that the station woke up some time after 5048 * it is unblocked, regardless of whether the station actually 5049 * woke up while blocked or not. 5050 */ 5051 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 5052 struct ieee80211_sta *pubsta, bool block); 5053 5054 /** 5055 * ieee80211_sta_eosp - notify mac80211 about end of SP 5056 * @pubsta: the station 5057 * 5058 * When a device transmits frames in a way that it can't tell 5059 * mac80211 in the TX status about the EOSP, it must clear the 5060 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 5061 * This applies for PS-Poll as well as uAPSD. 5062 * 5063 * Note that just like with _tx_status() and _rx() drivers must 5064 * not mix calls to irqsafe/non-irqsafe versions, this function 5065 * must not be mixed with those either. Use the all irqsafe, or 5066 * all non-irqsafe, don't mix! 5067 * 5068 * NB: the _irqsafe version of this function doesn't exist, no 5069 * driver needs it right now. Don't call this function if 5070 * you'd need the _irqsafe version, look at the git history 5071 * and restore the _irqsafe version! 5072 */ 5073 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 5074 5075 /** 5076 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP 5077 * @pubsta: the station 5078 * @tid: the tid of the NDP 5079 * 5080 * Sometimes the device understands that it needs to close 5081 * the Service Period unexpectedly. This can happen when 5082 * sending frames that are filling holes in the BA window. 5083 * In this case, the device can ask mac80211 to send a 5084 * Nullfunc frame with EOSP set. When that happens, the 5085 * driver must have called ieee80211_sta_set_buffered() to 5086 * let mac80211 know that there are no buffered frames any 5087 * more, otherwise mac80211 will get the more_data bit wrong. 5088 * The low level driver must have made sure that the frame 5089 * will be sent despite the station being in power-save. 5090 * Mac80211 won't call allow_buffered_frames(). 5091 * Note that calling this function, doesn't exempt the driver 5092 * from closing the EOSP properly, it will still have to call 5093 * ieee80211_sta_eosp when the NDP is sent. 5094 */ 5095 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid); 5096 5097 /** 5098 * ieee80211_iter_keys - iterate keys programmed into the device 5099 * @hw: pointer obtained from ieee80211_alloc_hw() 5100 * @vif: virtual interface to iterate, may be %NULL for all 5101 * @iter: iterator function that will be called for each key 5102 * @iter_data: custom data to pass to the iterator function 5103 * 5104 * This function can be used to iterate all the keys known to 5105 * mac80211, even those that weren't previously programmed into 5106 * the device. This is intended for use in WoWLAN if the device 5107 * needs reprogramming of the keys during suspend. Note that due 5108 * to locking reasons, it is also only safe to call this at few 5109 * spots since it must hold the RTNL and be able to sleep. 5110 * 5111 * The order in which the keys are iterated matches the order 5112 * in which they were originally installed and handed to the 5113 * set_key callback. 5114 */ 5115 void ieee80211_iter_keys(struct ieee80211_hw *hw, 5116 struct ieee80211_vif *vif, 5117 void (*iter)(struct ieee80211_hw *hw, 5118 struct ieee80211_vif *vif, 5119 struct ieee80211_sta *sta, 5120 struct ieee80211_key_conf *key, 5121 void *data), 5122 void *iter_data); 5123 5124 /** 5125 * ieee80211_iter_keys_rcu - iterate keys programmed into the device 5126 * @hw: pointer obtained from ieee80211_alloc_hw() 5127 * @vif: virtual interface to iterate, may be %NULL for all 5128 * @iter: iterator function that will be called for each key 5129 * @iter_data: custom data to pass to the iterator function 5130 * 5131 * This function can be used to iterate all the keys known to 5132 * mac80211, even those that weren't previously programmed into 5133 * the device. Note that due to locking reasons, keys of station 5134 * in removal process will be skipped. 5135 * 5136 * This function requires being called in an RCU critical section, 5137 * and thus iter must be atomic. 5138 */ 5139 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, 5140 struct ieee80211_vif *vif, 5141 void (*iter)(struct ieee80211_hw *hw, 5142 struct ieee80211_vif *vif, 5143 struct ieee80211_sta *sta, 5144 struct ieee80211_key_conf *key, 5145 void *data), 5146 void *iter_data); 5147 5148 /** 5149 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 5150 * @hw: pointre obtained from ieee80211_alloc_hw(). 5151 * @iter: iterator function 5152 * @iter_data: data passed to iterator function 5153 * 5154 * Iterate all active channel contexts. This function is atomic and 5155 * doesn't acquire any locks internally that might be held in other 5156 * places while calling into the driver. 5157 * 5158 * The iterator will not find a context that's being added (during 5159 * the driver callback to add it) but will find it while it's being 5160 * removed. 5161 * 5162 * Note that during hardware restart, all contexts that existed 5163 * before the restart are considered already present so will be 5164 * found while iterating, whether they've been re-added already 5165 * or not. 5166 */ 5167 void ieee80211_iter_chan_contexts_atomic( 5168 struct ieee80211_hw *hw, 5169 void (*iter)(struct ieee80211_hw *hw, 5170 struct ieee80211_chanctx_conf *chanctx_conf, 5171 void *data), 5172 void *iter_data); 5173 5174 /** 5175 * ieee80211_ap_probereq_get - retrieve a Probe Request template 5176 * @hw: pointer obtained from ieee80211_alloc_hw(). 5177 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5178 * 5179 * Creates a Probe Request template which can, for example, be uploaded to 5180 * hardware. The template is filled with bssid, ssid and supported rate 5181 * information. This function must only be called from within the 5182 * .bss_info_changed callback function and only in managed mode. The function 5183 * is only useful when the interface is associated, otherwise it will return 5184 * %NULL. 5185 * 5186 * Return: The Probe Request template. %NULL on error. 5187 */ 5188 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 5189 struct ieee80211_vif *vif); 5190 5191 /** 5192 * ieee80211_beacon_loss - inform hardware does not receive beacons 5193 * 5194 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5195 * 5196 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 5197 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 5198 * hardware is not receiving beacons with this function. 5199 */ 5200 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 5201 5202 /** 5203 * ieee80211_connection_loss - inform hardware has lost connection to the AP 5204 * 5205 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5206 * 5207 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 5208 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 5209 * needs to inform if the connection to the AP has been lost. 5210 * The function may also be called if the connection needs to be terminated 5211 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 5212 * 5213 * This function will cause immediate change to disassociated state, 5214 * without connection recovery attempts. 5215 */ 5216 void ieee80211_connection_loss(struct ieee80211_vif *vif); 5217 5218 /** 5219 * ieee80211_resume_disconnect - disconnect from AP after resume 5220 * 5221 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5222 * 5223 * Instructs mac80211 to disconnect from the AP after resume. 5224 * Drivers can use this after WoWLAN if they know that the 5225 * connection cannot be kept up, for example because keys were 5226 * used while the device was asleep but the replay counters or 5227 * similar cannot be retrieved from the device during resume. 5228 * 5229 * Note that due to implementation issues, if the driver uses 5230 * the reconfiguration functionality during resume the interface 5231 * will still be added as associated first during resume and then 5232 * disconnect normally later. 5233 * 5234 * This function can only be called from the resume callback and 5235 * the driver must not be holding any of its own locks while it 5236 * calls this function, or at least not any locks it needs in the 5237 * key configuration paths (if it supports HW crypto). 5238 */ 5239 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 5240 5241 /** 5242 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 5243 * rssi threshold triggered 5244 * 5245 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5246 * @rssi_event: the RSSI trigger event type 5247 * @gfp: context flags 5248 * 5249 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 5250 * monitoring is configured with an rssi threshold, the driver will inform 5251 * whenever the rssi level reaches the threshold. 5252 */ 5253 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5254 enum nl80211_cqm_rssi_threshold_event rssi_event, 5255 gfp_t gfp); 5256 5257 /** 5258 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss 5259 * 5260 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5261 * @gfp: context flags 5262 */ 5263 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp); 5264 5265 /** 5266 * ieee80211_radar_detected - inform that a radar was detected 5267 * 5268 * @hw: pointer as obtained from ieee80211_alloc_hw() 5269 */ 5270 void ieee80211_radar_detected(struct ieee80211_hw *hw); 5271 5272 /** 5273 * ieee80211_chswitch_done - Complete channel switch process 5274 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5275 * @success: make the channel switch successful or not 5276 * 5277 * Complete the channel switch post-process: set the new operational channel 5278 * and wake up the suspended queues. 5279 */ 5280 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 5281 5282 /** 5283 * ieee80211_request_smps - request SM PS transition 5284 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5285 * @smps_mode: new SM PS mode 5286 * 5287 * This allows the driver to request an SM PS transition in managed 5288 * mode. This is useful when the driver has more information than 5289 * the stack about possible interference, for example by bluetooth. 5290 */ 5291 void ieee80211_request_smps(struct ieee80211_vif *vif, 5292 enum ieee80211_smps_mode smps_mode); 5293 5294 /** 5295 * ieee80211_ready_on_channel - notification of remain-on-channel start 5296 * @hw: pointer as obtained from ieee80211_alloc_hw() 5297 */ 5298 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 5299 5300 /** 5301 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 5302 * @hw: pointer as obtained from ieee80211_alloc_hw() 5303 */ 5304 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 5305 5306 /** 5307 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 5308 * 5309 * in order not to harm the system performance and user experience, the device 5310 * may request not to allow any rx ba session and tear down existing rx ba 5311 * sessions based on system constraints such as periodic BT activity that needs 5312 * to limit wlan activity (eg.sco or a2dp)." 5313 * in such cases, the intention is to limit the duration of the rx ppdu and 5314 * therefore prevent the peer device to use a-mpdu aggregation. 5315 * 5316 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5317 * @ba_rx_bitmap: Bit map of open rx ba per tid 5318 * @addr: & to bssid mac address 5319 */ 5320 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 5321 const u8 *addr); 5322 5323 /** 5324 * ieee80211_mark_rx_ba_filtered_frames - move RX BA window and mark filtered 5325 * @pubsta: station struct 5326 * @tid: the session's TID 5327 * @ssn: starting sequence number of the bitmap, all frames before this are 5328 * assumed to be out of the window after the call 5329 * @filtered: bitmap of filtered frames, BIT(0) is the @ssn entry etc. 5330 * @received_mpdus: number of received mpdus in firmware 5331 * 5332 * This function moves the BA window and releases all frames before @ssn, and 5333 * marks frames marked in the bitmap as having been filtered. Afterwards, it 5334 * checks if any frames in the window starting from @ssn can now be released 5335 * (in case they were only waiting for frames that were filtered.) 5336 */ 5337 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, 5338 u16 ssn, u64 filtered, 5339 u16 received_mpdus); 5340 5341 /** 5342 * ieee80211_send_bar - send a BlockAckReq frame 5343 * 5344 * can be used to flush pending frames from the peer's aggregation reorder 5345 * buffer. 5346 * 5347 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5348 * @ra: the peer's destination address 5349 * @tid: the TID of the aggregation session 5350 * @ssn: the new starting sequence number for the receiver 5351 */ 5352 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 5353 5354 /** 5355 * ieee80211_start_rx_ba_session_offl - start a Rx BA session 5356 * 5357 * Some device drivers may offload part of the Rx aggregation flow including 5358 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5359 * reordering. 5360 * 5361 * Create structures responsible for reordering so device drivers may call here 5362 * when they complete AddBa negotiation. 5363 * 5364 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5365 * @addr: station mac address 5366 * @tid: the rx tid 5367 */ 5368 void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, 5369 const u8 *addr, u16 tid); 5370 5371 /** 5372 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session 5373 * 5374 * Some device drivers may offload part of the Rx aggregation flow including 5375 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5376 * reordering. 5377 * 5378 * Destroy structures responsible for reordering so device drivers may call here 5379 * when they complete DelBa negotiation. 5380 * 5381 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5382 * @addr: station mac address 5383 * @tid: the rx tid 5384 */ 5385 void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, 5386 const u8 *addr, u16 tid); 5387 5388 /* Rate control API */ 5389 5390 /** 5391 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 5392 * 5393 * @hw: The hardware the algorithm is invoked for. 5394 * @sband: The band this frame is being transmitted on. 5395 * @bss_conf: the current BSS configuration 5396 * @skb: the skb that will be transmitted, the control information in it needs 5397 * to be filled in 5398 * @reported_rate: The rate control algorithm can fill this in to indicate 5399 * which rate should be reported to userspace as the current rate and 5400 * used for rate calculations in the mesh network. 5401 * @rts: whether RTS will be used for this frame because it is longer than the 5402 * RTS threshold 5403 * @short_preamble: whether mac80211 will request short-preamble transmission 5404 * if the selected rate supports it 5405 * @max_rate_idx: user-requested maximum (legacy) rate 5406 * (deprecated; this will be removed once drivers get updated to use 5407 * rate_idx_mask) 5408 * @rate_idx_mask: user-requested (legacy) rate mask 5409 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 5410 * @bss: whether this frame is sent out in AP or IBSS mode 5411 */ 5412 struct ieee80211_tx_rate_control { 5413 struct ieee80211_hw *hw; 5414 struct ieee80211_supported_band *sband; 5415 struct ieee80211_bss_conf *bss_conf; 5416 struct sk_buff *skb; 5417 struct ieee80211_tx_rate reported_rate; 5418 bool rts, short_preamble; 5419 u8 max_rate_idx; 5420 u32 rate_idx_mask; 5421 u8 *rate_idx_mcs_mask; 5422 bool bss; 5423 }; 5424 5425 struct rate_control_ops { 5426 const char *name; 5427 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 5428 void (*free)(void *priv); 5429 5430 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 5431 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 5432 struct cfg80211_chan_def *chandef, 5433 struct ieee80211_sta *sta, void *priv_sta); 5434 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 5435 struct cfg80211_chan_def *chandef, 5436 struct ieee80211_sta *sta, void *priv_sta, 5437 u32 changed); 5438 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 5439 void *priv_sta); 5440 5441 void (*tx_status_noskb)(void *priv, 5442 struct ieee80211_supported_band *sband, 5443 struct ieee80211_sta *sta, void *priv_sta, 5444 struct ieee80211_tx_info *info); 5445 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 5446 struct ieee80211_sta *sta, void *priv_sta, 5447 struct sk_buff *skb); 5448 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 5449 struct ieee80211_tx_rate_control *txrc); 5450 5451 void (*add_sta_debugfs)(void *priv, void *priv_sta, 5452 struct dentry *dir); 5453 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 5454 5455 u32 (*get_expected_throughput)(void *priv_sta); 5456 }; 5457 5458 static inline int rate_supported(struct ieee80211_sta *sta, 5459 enum nl80211_band band, 5460 int index) 5461 { 5462 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 5463 } 5464 5465 /** 5466 * rate_control_send_low - helper for drivers for management/no-ack frames 5467 * 5468 * Rate control algorithms that agree to use the lowest rate to 5469 * send management frames and NO_ACK data with the respective hw 5470 * retries should use this in the beginning of their mac80211 get_rate 5471 * callback. If true is returned the rate control can simply return. 5472 * If false is returned we guarantee that sta and sta and priv_sta is 5473 * not null. 5474 * 5475 * Rate control algorithms wishing to do more intelligent selection of 5476 * rate for multicast/broadcast frames may choose to not use this. 5477 * 5478 * @sta: &struct ieee80211_sta pointer to the target destination. Note 5479 * that this may be null. 5480 * @priv_sta: private rate control structure. This may be null. 5481 * @txrc: rate control information we sholud populate for mac80211. 5482 */ 5483 bool rate_control_send_low(struct ieee80211_sta *sta, 5484 void *priv_sta, 5485 struct ieee80211_tx_rate_control *txrc); 5486 5487 5488 static inline s8 5489 rate_lowest_index(struct ieee80211_supported_band *sband, 5490 struct ieee80211_sta *sta) 5491 { 5492 int i; 5493 5494 for (i = 0; i < sband->n_bitrates; i++) 5495 if (rate_supported(sta, sband->band, i)) 5496 return i; 5497 5498 /* warn when we cannot find a rate. */ 5499 WARN_ON_ONCE(1); 5500 5501 /* and return 0 (the lowest index) */ 5502 return 0; 5503 } 5504 5505 static inline 5506 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 5507 struct ieee80211_sta *sta) 5508 { 5509 unsigned int i; 5510 5511 for (i = 0; i < sband->n_bitrates; i++) 5512 if (rate_supported(sta, sband->band, i)) 5513 return true; 5514 return false; 5515 } 5516 5517 /** 5518 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 5519 * 5520 * When not doing a rate control probe to test rates, rate control should pass 5521 * its rate selection to mac80211. If the driver supports receiving a station 5522 * rate table, it will use it to ensure that frames are always sent based on 5523 * the most recent rate control module decision. 5524 * 5525 * @hw: pointer as obtained from ieee80211_alloc_hw() 5526 * @pubsta: &struct ieee80211_sta pointer to the target destination. 5527 * @rates: new tx rate set to be used for this station. 5528 */ 5529 int rate_control_set_rates(struct ieee80211_hw *hw, 5530 struct ieee80211_sta *pubsta, 5531 struct ieee80211_sta_rates *rates); 5532 5533 int ieee80211_rate_control_register(const struct rate_control_ops *ops); 5534 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 5535 5536 static inline bool 5537 conf_is_ht20(struct ieee80211_conf *conf) 5538 { 5539 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 5540 } 5541 5542 static inline bool 5543 conf_is_ht40_minus(struct ieee80211_conf *conf) 5544 { 5545 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5546 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 5547 } 5548 5549 static inline bool 5550 conf_is_ht40_plus(struct ieee80211_conf *conf) 5551 { 5552 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5553 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 5554 } 5555 5556 static inline bool 5557 conf_is_ht40(struct ieee80211_conf *conf) 5558 { 5559 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 5560 } 5561 5562 static inline bool 5563 conf_is_ht(struct ieee80211_conf *conf) 5564 { 5565 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 5566 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 5567 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 5568 } 5569 5570 static inline enum nl80211_iftype 5571 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 5572 { 5573 if (p2p) { 5574 switch (type) { 5575 case NL80211_IFTYPE_STATION: 5576 return NL80211_IFTYPE_P2P_CLIENT; 5577 case NL80211_IFTYPE_AP: 5578 return NL80211_IFTYPE_P2P_GO; 5579 default: 5580 break; 5581 } 5582 } 5583 return type; 5584 } 5585 5586 static inline enum nl80211_iftype 5587 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 5588 { 5589 return ieee80211_iftype_p2p(vif->type, vif->p2p); 5590 } 5591 5592 /** 5593 * ieee80211_update_mu_groups - set the VHT MU-MIMO groud data 5594 * 5595 * @vif: the specified virtual interface 5596 * @membership: 64 bits array - a bit is set if station is member of the group 5597 * @position: 2 bits per group id indicating the position in the group 5598 * 5599 * Note: This function assumes that the given vif is valid and the position and 5600 * membership data is of the correct size and are in the same byte order as the 5601 * matching GroupId management frame. 5602 * Calls to this function need to be serialized with RX path. 5603 */ 5604 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 5605 const u8 *membership, const u8 *position); 5606 5607 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 5608 int rssi_min_thold, 5609 int rssi_max_thold); 5610 5611 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 5612 5613 /** 5614 * ieee80211_ave_rssi - report the average RSSI for the specified interface 5615 * 5616 * @vif: the specified virtual interface 5617 * 5618 * Note: This function assumes that the given vif is valid. 5619 * 5620 * Return: The average RSSI value for the requested interface, or 0 if not 5621 * applicable. 5622 */ 5623 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 5624 5625 /** 5626 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 5627 * @vif: virtual interface 5628 * @wakeup: wakeup reason(s) 5629 * @gfp: allocation flags 5630 * 5631 * See cfg80211_report_wowlan_wakeup(). 5632 */ 5633 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 5634 struct cfg80211_wowlan_wakeup *wakeup, 5635 gfp_t gfp); 5636 5637 /** 5638 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 5639 * @hw: pointer as obtained from ieee80211_alloc_hw() 5640 * @vif: virtual interface 5641 * @skb: frame to be sent from within the driver 5642 * @band: the band to transmit on 5643 * @sta: optional pointer to get the station to send the frame to 5644 * 5645 * Note: must be called under RCU lock 5646 */ 5647 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 5648 struct ieee80211_vif *vif, struct sk_buff *skb, 5649 int band, struct ieee80211_sta **sta); 5650 5651 /** 5652 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 5653 * 5654 * @next_tsf: TSF timestamp of the next absent state change 5655 * @has_next_tsf: next absent state change event pending 5656 * 5657 * @absent: descriptor bitmask, set if GO is currently absent 5658 * 5659 * private: 5660 * 5661 * @count: count fields from the NoA descriptors 5662 * @desc: adjusted data from the NoA 5663 */ 5664 struct ieee80211_noa_data { 5665 u32 next_tsf; 5666 bool has_next_tsf; 5667 5668 u8 absent; 5669 5670 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 5671 struct { 5672 u32 start; 5673 u32 duration; 5674 u32 interval; 5675 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 5676 }; 5677 5678 /** 5679 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 5680 * 5681 * @attr: P2P NoA IE 5682 * @data: NoA tracking data 5683 * @tsf: current TSF timestamp 5684 * 5685 * Return: number of successfully parsed descriptors 5686 */ 5687 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 5688 struct ieee80211_noa_data *data, u32 tsf); 5689 5690 /** 5691 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 5692 * 5693 * @data: NoA tracking data 5694 * @tsf: current TSF timestamp 5695 */ 5696 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 5697 5698 /** 5699 * ieee80211_tdls_oper - request userspace to perform a TDLS operation 5700 * @vif: virtual interface 5701 * @peer: the peer's destination address 5702 * @oper: the requested TDLS operation 5703 * @reason_code: reason code for the operation, valid for TDLS teardown 5704 * @gfp: allocation flags 5705 * 5706 * See cfg80211_tdls_oper_request(). 5707 */ 5708 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, 5709 enum nl80211_tdls_operation oper, 5710 u16 reason_code, gfp_t gfp); 5711 5712 /** 5713 * ieee80211_reserve_tid - request to reserve a specific TID 5714 * 5715 * There is sometimes a need (such as in TDLS) for blocking the driver from 5716 * using a specific TID so that the FW can use it for certain operations such 5717 * as sending PTI requests. To make sure that the driver doesn't use that TID, 5718 * this function must be called as it flushes out packets on this TID and marks 5719 * it as blocked, so that any transmit for the station on this TID will be 5720 * redirected to the alternative TID in the same AC. 5721 * 5722 * Note that this function blocks and may call back into the driver, so it 5723 * should be called without driver locks held. Also note this function should 5724 * only be called from the driver's @sta_state callback. 5725 * 5726 * @sta: the station to reserve the TID for 5727 * @tid: the TID to reserve 5728 * 5729 * Returns: 0 on success, else on failure 5730 */ 5731 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); 5732 5733 /** 5734 * ieee80211_unreserve_tid - request to unreserve a specific TID 5735 * 5736 * Once there is no longer any need for reserving a certain TID, this function 5737 * should be called, and no longer will packets have their TID modified for 5738 * preventing use of this TID in the driver. 5739 * 5740 * Note that this function blocks and acquires a lock, so it should be called 5741 * without driver locks held. Also note this function should only be called 5742 * from the driver's @sta_state callback. 5743 * 5744 * @sta: the station 5745 * @tid: the TID to unreserve 5746 */ 5747 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); 5748 5749 /** 5750 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue 5751 * 5752 * @hw: pointer as obtained from ieee80211_alloc_hw() 5753 * @txq: pointer obtained from station or virtual interface 5754 * 5755 * Returns the skb if successful, %NULL if no frame was available. 5756 */ 5757 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 5758 struct ieee80211_txq *txq); 5759 5760 /** 5761 * ieee80211_txq_get_depth - get pending frame/byte count of given txq 5762 * 5763 * The values are not guaranteed to be coherent with regard to each other, i.e. 5764 * txq state can change half-way of this function and the caller may end up 5765 * with "new" frame_cnt and "old" byte_cnt or vice-versa. 5766 * 5767 * @txq: pointer obtained from station or virtual interface 5768 * @frame_cnt: pointer to store frame count 5769 * @byte_cnt: pointer to store byte count 5770 */ 5771 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 5772 unsigned long *frame_cnt, 5773 unsigned long *byte_cnt); 5774 5775 /** 5776 * ieee80211_nan_func_terminated - notify about NAN function termination. 5777 * 5778 * This function is used to notify mac80211 about NAN function termination. 5779 * Note that this function can't be called from hard irq. 5780 * 5781 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5782 * @inst_id: the local instance id 5783 * @reason: termination reason (one of the NL80211_NAN_FUNC_TERM_REASON_*) 5784 * @gfp: allocation flags 5785 */ 5786 void ieee80211_nan_func_terminated(struct ieee80211_vif *vif, 5787 u8 inst_id, 5788 enum nl80211_nan_func_term_reason reason, 5789 gfp_t gfp); 5790 5791 /** 5792 * ieee80211_nan_func_match - notify about NAN function match event. 5793 * 5794 * This function is used to notify mac80211 about NAN function match. The 5795 * cookie inside the match struct will be assigned by mac80211. 5796 * Note that this function can't be called from hard irq. 5797 * 5798 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5799 * @match: match event information 5800 * @gfp: allocation flags 5801 */ 5802 void ieee80211_nan_func_match(struct ieee80211_vif *vif, 5803 struct cfg80211_nan_match_params *match, 5804 gfp_t gfp); 5805 5806 #endif /* MAC80211_H */ 5807